Full opinion text
Opinion THE COURT. In this death penalty case, a jury convicted defendant Armenia Levi Cudjo of the first degree murder of Amelia P. (Pen. Code, §187; all further statutory references are to this code unless otherwise indicated); it found that defendant used a deadly weapon to commit the murder (§ 12022, subd. (b)) and that defendant committed the murder while engaged in the commission of robbery (§ 190.2, subd. (a)(17)(i)) and burglary (§ 190.2, subd. (a)(17)(vii)). The jury also convicted defendant of one count each of robbery (§ 211) with the use of a deadly weapon (§ 12022, subd. (b)) and burglary of an inhabited dwelling (§§ 459, 462, subd. (a)). The jury fixed the penalty for the murder at death. The trial court denied the automatic motion to modify this penalty verdict (§ 190.4, subd. (e)), stayed the pronouncement of sentence on the noncapital counts, and sentenced defendant to death. Defendant’s appeal from the judgment is automatic. (§ 1239, subd. (b).) We conclude that the judgment should be affirmed in its entirety. I. Facts and Proceedings A. Guilt Phase 1. Prosecution evidence On March 21, 1986, Los Angeles County sheriff’s deputies found the body of Amelia P. in the master bedroom of her home in the desert community of Littlerock, in the County of Los Angeles. The body was face down on the floor, with the hands tied together behind the victim’s back, the ankles tied together, and the hands tied to the ankles. These bindings were made with neckties belonging to the victim’s husband, Ubaldo P. A piece of cloth was found in the victim’s mouth, secured by a necktie tied around the victim’s head and upper neck. The body was clothed only in a robe. On the floor near the body were the victim’s underwear, socks, and running shoes, as well as a bloodstained hammer and the broken tip of a fireplace poker. The cause of death was multiple blows to the back and sides of the head, fracturing the skull and lacerating the brain. Semen was present on the victim’s right inner thigh and genital area, but there were no indications of traumatic sexual assault. Based on the temperature of the liver when the body was found, death was estimated to have occurred between 8:10 a.m. and 12:30 p.m. that day. The victim’s blood tested negative for alcohol and an array of illegal drugs, including cocaine. Kevin P., the youngest of the victim’s sons, was five years old on the day of his mother’s death, and seven years old when he testified at trial. According to that testimony, a Black man Kevin had never seen before entered the house with a knife in his hand. The man had no facial hair and no tattoos on his arms. It was before lunch, and Kevin was under a table in the living room watching television. The man, who was wearing a sleeveless blue top and dark blue cut-off pants, put the knife to the victim’s neck and demanded money. As Kevin described it, the knife was black with a “little round silver ball around it, and it was a survival knife.” At the man’s direction, Kevin retrieved the keys to the family van from the kitchen and gave them to the man. The man tried to start the van but was unable to do so. The man then took the victim to the master bedroom, where the man tied up the victim. From the closet in the master bedroom, the man removed two guns belonging to Kevin’s father. Kevin went into his own bedroom and stayed there for a long time. Some days later, Kevin attended a lineup but did not identify anyone. tibaldo P. testified that he had left the house that morning between midnight and 1 a.m. to go to work 77 miles away in the City of Commerce. When he returned at 5 p.m., the sheriff’s deputies were already there. Missing from the house were an M-l carbine, a 30.06 rifle, and an army duffel bag. The victim’s jewelry case, usually kept in the bedroom, was in the family van. The hammer found on the bedroom floor was normally kept in a toolbox in the garage. The fireplace poker was in its usual place, but there were bloodstains on the shaft and the tip had been broken off. The victim was very neat and normally did not leave her clothing on the floor. He had no reason to suspect that she was abusing drugs or alcohol. Investigating officers found the keys to the van outside the victim’s house, about 30 feet from the rear garage door. Nearby, the officers found a single set of shoe prints leading away from the house. It had rained the previous day, making a crusty surface. The officers followed the tracks for about a third of a mile, at intervals observing marks consistent with an object such as a rifle dragging on the ground. The tracks led to a camper, from which the victim’s house was easily visible. The officers ordered the occupants to leave the camper. Defendant and his brother Gregory emerged from the camper and were taken into custody. Inside the camper, the officers found a pair of MacGregor athletic shoes that could have made the shoe prints. The officers found an identical pair of athletic shoes behind the front seat of an automobile belonging to defendant’s mother, Maxine Cudjo. Unlike the shoes found in the camper, the shoes found in the automobile were “very wet.” In addition to the shoes, the officers found a black survival knife and a pair of cut-off blue jeans in the Cudjo camper. When shown these articles at trial, Kevin testified that the knife was different from the knife wielded by the man who had assaulted his mother, and that the cut-off pants the assailant had worn were similar to, but shorter than, the ones found in the Cudjo camper. No firearms were found in the camper or in Maxine Cudjo’s automobile. Maxine Cudjo testified that on the day of the murder she was living in the camper. Defendant and Gregory had slept in the camper the previous night, as they occasionally did. She spent most of that morning in the house next door, doing housework for the man who owned the land under the camper. Returning to the camper at 11 a.m., she found defendant and Gregory, both wearing their MacGregor athletic shoes. The three of them went in Maxine’s car to the post office and then to the residence of Julia Watson, one of Maxine Cudjo’s daughters. Maxine returned to the camper; a little while later, at about 1:30 p.m., she departed again in her car to visit friends, leaving defendant and Gregory in the camper. On her next return to the camper, at approximately 4 p.m., sheriff’s deputies had taken her sons into custody. Julia Watson testified that her mother had visited her house that day with defendant and Gregory at approximately 1 or 2 p.m. Defendant was wearing cut-off jeans and work boots; Gregory wore shorts and tennis shoes. Gregory Cudjo did not testify at trial, but the prosecution introduced evidence of the testimony he had given at defendant’s preliminary hearing and statements he had made to investigating officers during a tape-recorded interview the morning of the day after the murder of Amelia P. In these prior statements, Gregory maintained that he had remained in the camper throughout the morning of the murder until his mother returned at approximately 11 a.m. During this time, he alternately slept and listened to a professional baseball game on the radio. He said defendant was gone from the camper for about two hours, leaving at about the time the baseball game started and returning at the same time as Maxine. During the taped interview, Gregory said that later that afternoon defendant had washed off his MacGregor athletic shoes when they were at Julia Watson’s house. Analysis of semen found on the victim’s external genital area and right inner thigh revealed that it could have come from defendant but could not have come from Gregory Cudjo or from Ubaldo P. 2. Defense evidence Defendant testified in his own behalf. He admitted that he knew Amelia P., that he had been in her house on the morning of her death, and that he had had sexual relations with her, but he denied that he had killed her. He said he had seen Amelia P. on three occasions before the day of her death. Defendant explained that he and a woman named Iris Thomas had worked together selling cocaine, and that he had derived most of his income from this illicit trade. On two occasions, he had seen Amelia P. purchase cocaine. One of these transactions had occurred in the parking lot of an apartment complex in Quartz Hill. The other transaction had occurred on March 4 or 5, 1986, at a house belonging to Thomas’s mother. According to defendant, Amelia P. had announced at the door that she had come “to see Miss Thomas about some coke.” Defendant had invited Amelia inside. Amelia had asked Thomas’s mother to “front her an eight track of cocaine.” (Defendant testified that an “eight track” is one-eighth of an ounce.) After some discussion of arrangements for payment, Thomas’s mother had given cocaine to Amelia. On a later date, defendant had seen Amelia P. at a market and they had waved to each other but had not conversed. On the morning of March 21, defendant was driving his mother’s car to a friend’s house when he noticed Amelia P. standing in the front yard of her residence. She was wearing a housecoat or robe. It was about 9 a.m. When he blew the horn, she came to the car and asked how he had been and if he knew anybody who had any cocaine. Defendant said he had some. She asked if she could have it on credit as a favor. He said that it would depend on whether she would do him a favor. They agreed to talk about it further. Defendant drove to the camper, retrieved some cocaine, and returned to the victim’s residence. Amelia P. invited him into the house. He sold her some cocaine on credit for $50. (Sheriff’s officers did not find rock cocaine at the victim’s residence, but they did find an empty “baggie” in the garage. Just two and one-half inches square, the baggie was smaller than the ones normally sold in supermarkets; it was a convenient size for $50 worth of rock cocaine. The officers did not take possession of the baggie.) Defendant smoked some cocaine, then asked Amelia P. when she could pay him. After further conversation, Amelia agreed to have sex with defendant in lieu of cash payment. They engaged in sexual intercourse on the living room couch; defendant left five minutes later. Defendant did not see anyone else in the house. He went back to the camper and told Gregory he had had sex with Amelia P. in exchange for cocaine. Defendant then went jogging. He did not wear the MacGregor shoes, which had cleats, but athletic shoes with smooth soles. When he returned to the camper, Gregory was there and their mother arrived about five minutes later. Defendant changed to work boots. Gregory and defendant went with their mother to the post office, and then to Julia Watson’s house. Defendant sat in the front passenger seat of his mother’s automobile during this excursion. At that time, defendant had tattoos on both biceps, on his right shoulder, and on his lower left arm. Defendant denied owning the cut-offs found in the camper and denied knowing to whom they belonged, although he admitted he had seen them in the camper. Defendant admitted owning the survival knife found in the camper. Gregory is two years younger than defendant and had no facial hair on the day of the murder. (Apparently, a photograph in evidence, taken on the day of the murder after defendant’s arrest, showed that defendant had a goatee and/or a mustache.) To establish Gregory’s knowledge of the details of the murder, the defense introduced the complete tape recordings of Gregory’s two interviews with investigating officers. During these interviews, Gregory said that when defendant saw the officers following his tracks to the camper, he admitted to Gregory that it appeared the officers were following his (i.e., defendant’s) tracks. According to Gregory, defendant gave this description of what he had done: Defendant had hidden and the woman had walked up with a basket of clothes. The woman was wearing a housecoat, which came open. Defendant rushed up, grabbed her, put a knife to her throat, and said he wanted only money. The woman had no money and no jewelry, but defendant took a couple of shotguns, one of which looked like a rifle. The woman started to make a lot of noise, so defendant put a sock in her mouth. There was a little boy, and there was a boa constrictor in an aquarium. (Kevin kept a pet snake in his bedroom.) The little boy had shown defendant where to find the keys to a van. Defendant had started the van but was unable to drive it out of the garage because the garage door was padlocked on the outside. Defendant had “hogtied” the woman with some neckties that were in the closet “next to a . . . jacket with all kinds of medals on it—something like a Ranger jacket or something.” (Ubaldo P. testified he had been an Airborne Ranger in the United States Army, and his green full-dress uniform had been hanging in the closet.) Defendant became “real nervous” because the woman had said her husband would come home at noon and it was then 11:25 a.m. He had tied her up to give himself enough time to get away. He did not rape the woman. According to Gregory, defendant said nothing about hitting the woman. By stipulation, the defense established, first, that Kevin had told investigating officers on the day of the murder that he had been watching a certain television program when the intruder entered his house; second, that this program had been broadcast that day from 10:30 to 11:00 a.m.; and, third, that the professional baseball game that was broadcast that morning began at 10:30 a.m. An expert in drug dependency testified that it is frequently impossible to determine from an individual’s appearance and behavior whether that individual has been using cocaine. He also testified that it is not uncommon for the spouse of a cocaine addict to profess ignorance of the addict’s use of cocaine. This may indicate genuine ignorance or the psychological state of denial. A defense investigator testified that he had driven the route that defendant said in his testimony that he had jogged on the morning of the murder and that the distance was three miles. 3. Rebuttal On rebuttal, Deputy Sheriff Robert Flores testified that on March 21, 1986, the time from the landing of the sheriff’s helicopter at the victim’s residence to the officers’ arrival at the Cudjo camper was at least one hour and thirty minutes. B. Penalty Phase The prosecution presented no evidence at the penalty phase. The only defense evidence was the testimony of defendant. Asked but a single question, defendant again denied killing Amelia P. There was no cross-examination. II. Guilt Phase Errors A. Exclusion of Evidence of Gregory Cudjo’s Confession Defendant contends that the trial court erred in excluding evidence that Gregory had confessed to the murder of Amelia P. We agree that the ruling was erroneous, but we conclude that defendant was not thereby prejudiced. 1. Proceedings in the trial court The prosecution had intended to call Gregory Cudjo as a witness during its case-in-chief, but the trial court determined that Gregory was unavailable as a witness (see Evid. Code, § 240) after Gregory asserted his privilege against self-incrimination during a nonjury hearing. The prosecution then introduced the testimony Gregory had given at defendant’s preliminary hearing. During the defense case, defense counsel represented to the trial court that John Lee Culver was prepared to testify that Gregory Cudjo had admitted responsibility for the murder of Amelia P. while Culver and Gregory were incarcerated together at the Antelope Valley sheriff’s substation. The prosecutor remarked that the trial court would have to rule on the admissibility of the proposed testimony both as a statement against penal interest and under Evidence Code section 352. To permit the trial court to make the necessary determinations of preliminary fact (see Evid. Code, § 402), Culver then testified out of the jury’s presence, to the following effect. When not incarcerated, Culver lived in Littlerock. He had known defendant for approximately 15 to 20 years. He also knew defendant’s mother, his sisters, and his brother Gregory. In March 1986, Culver was in custody at the Antelope Valley sheriff’s substation, where he shared a cell with Gregory Cudjo. Because of Gregory’s restless pacing, Culver asked what was wrong. Gregory answered, “Man, they got me in here for a murder” and “I need [to] talk to somebody.” As Culver put it, Gregory then “started talking about why he’d done it and what he’d done . . . .” According to Culver, Gregory said, “I went over to rob, burglarize this lady’s house and she seen me and then that’s when all the stuff went down and that’s what happened.” Gregory then explained, in Culver’s words, that he “went in the house and this woman supposed to have been washing clothes, and she caught him coming in the house .... When the woman seen him he just started beating the woman up and then she started screaming, so he knocked her out and went and done it again, kept hitting her, kept hitting her .... He kept banging her around in the head.” Gregory reportedly said that the woman started screaming as soon as she saw him, that he “knocked her out,” that she “came back to," and that he “started hitting her and hitting her with a hammer or whatever he hit her with.” Gregory also said, reportedly, that he had found jewelry and guns in the house, and that he knew the lady because they had “smoked dope together.” Gregory did not mention raping the woman. On cross-examination, the prosecutor asked Culver if Gregory had mentioned anyone besides the woman being present in the house. Culver answered that at the time Gregory had not mentioned anyone else, but that Culver had talked to Gregory shortly before Culver’s testimony and that through this conversation Culver had learned that there “probably was a little boy or somebody in the house.” According to Culver, Gregory had been taken from the cell he shared with Culver. When Gregory returned, he told Culver that detectives had interviewed him about the murder. Asked whether Gregory had admitted inculpating defendant for the murder, Culver at first said that Gregory had done so, but he immediately changed his testimony, stating that he merely inferred that Gregory had blamed defendant because Gregory was released shortly thereafter and because defendant’s criminal record was worse than Gregory’s. Culver testified that he first became aware of defendant’s presence at the substation two days after his conversation with Gregory, when Culver was being taken to court. At that time, Culver told defendant nothing about Gregory’s confession, even after defendant said he was incarcerated for murder. Culver said he first spoke of the confession approximately three months before his testimony, when he was contacted and interviewed by a defense investigator. Following Culver’s testimony, the trial court invited argument. The prosecutor asserted that Culver’s demeanor, background, and relationship to the defendant, as well as the content of his testimony, made him unworthy of belief. The prosecutor framed the question as “whether or not we should allow a liar to testify in front of the jury just for the purpose of propping up a straw man.” The prosecutor urged the court to exclude Culver’s testimony under Evidence Code section 352 as inherently incredible. The court inquired whether it would then be “making a judgment as trier of fact and taking it away from the jury.” The prosecutor said that Evidence Code section 352 required this on some occasions. The court agreed it must “resolve” issues such as Culver’s friendship with defendant and the fact that Culver waited so long to come forward; “[t]hese are the things that I consider.” Defense counsel maintained that the evidence was admissible as a declaration against penal interest under Evidence Code section 1230. The trial court agreed with defense counsel that Gregory was unavailable as a witness because he had exercised his privilege against self-incrimination and that the statements attributed to him by Culver were against his penal interest. However, the court found that “to allow this testimony would be a travesty of justice . . . .” Concluding that the evidence lacked “indicia of reliability,” the court ruled that it was not admissible as a declaration against interest. In support of the ruling, the court cited Evidence Code section 1230 and People v. Martin (1983) 150 Cal.App.3d 148, 162 [197 Cal.Rptr. 655], Later that day, after another defense witness had testified before the jury, the trial court added that “in interpreting section 1230 of the Evidence Code” it had also relied upon People v. Chapman (1975) 50 Cal.App.3d 872, 878-881 [123 Cal.Rptr. 862], Later still, during a hearing on defendant’s motion for a new trial, the court stated “for the record” that it had found Culver’s testimony “unreliable and untrustworthy” and had concluded that the probative value of the evidence “was outweighed by prejudice under section 352 of the Evidence Code within the meaning of People versus Green, 27 Cal.3d 1 [164 Cal.Rptr. 1, 609 P.2d 468].” 2. Evidence Code section 1230 Under one of the statutory exceptions to the hearsay rule, a party may introduce in evidence, for the truth of the matter stated, an out-of-court statement by a declarant who is unavailable as a witness at trial if the statement, when made, was against the declarant’s penal, pecuniary, proprietary, or social interest. A party who maintains that an out-of-court statement is admissible under this exception as a declaration against penal interest must show that the declarant is unavailable, that the declaration was against the declarant’s penal interest, and that the declaration was sufficiently reliable to warrant admission despite its hearsay character. (People v. Frierson (1991) 53 Cal.3d 730, 745 [280 Cal.Rptr. 440, 808 P.2d 1197].) To determine whether the declaration passes the required threshold of trustworthiness, a trial court “may take into account not just the words but the circumstances under which they were uttered, the possible motivation of the declarant, and the declarant’s relationship to the defendant.” (Ibid.) On appeal, the trial court’s determination on this issue is reviewed for abuse of discretion. (Ibid.) Here, Gregory Cudjo was unavailable as a witness because he had chosen to exercise his privilege against self-incrimination. (People v. Leach (1975) 15 Cal.3d 419, 438 [124 Cal.Rptr. 752, 541 P.2d 296].) It is likewise not disputed or reasonably disputable that a statement confessing to a killing during the course of a burglary and robbery, as attributed to Gregory in Culver’s testimony, subjects the declarant to a risk of criminal liability and therefore on its face is against the alleged declarant’s penal interest. Moreover, given the circumstances of Gregory’s alleged statement, the trial court had discretion to conclude that it was admissible despite its hearsay character because, if made as claimed, it was probably true. By Culver’s account, Gregory made his statement spontaneously, while alone with an acquaintance, within hours after a murder for which Gregory, who had no alibi, was in custody as a prime suspect. Gregory tended to fit Kevin P.’s description of the assailant, and much of the other evidence, in particular the incriminating shoe prints, was as consistent with Gregory’s guilt as with defendant’s. It is true, as the People suggest, that the alleged statement was inconsistent to some extent with the physical evidence, most notably the evidence that the victim was hog-tied before she was beaten to death. However, such discrepancies might be attributable to Gregory’s agitation or Culver’s misunderstanding of what he was told. They did not negate all possibility that if Gregory claimed to be the murderer, he was telling the truth. Hence, the court could properly have found that “a reasonable [person] in [Gregory’s] position would not have made the statement unless he believed it to be true.” (Evid. Code, § 1230.) But the trial court did not focus exclusively, or even primarily, on whether Gregory’s hearsay statement might be false. Instead, the court apparently accepted the prosecution’s contention that Culver was probably a liar who should therefore be excluded as a live witness. In so doing, the court erred. The People argue that in considering the admissibility of evidence offered under the hearsay exception for declarations against interest, the trial court could properly consider the credibility of the in-court witness, Culver. We disagree. The credibility of the in-court witness is not a proper consideration in this context. Hearsay is generally excluded because the out-of-court declarant is not under oath and cannot be cross-examined to test perception, memory, clarity of expression, and veracity, and because the jury (or other trier of fact) is unable to observe the declarant’s demeanor. (See Chambers v. Mississippi (1973) 410 U.S. 284, 298 [35 L.Ed.2d 297, 310-311, 93 S.Ct. 1038]; People v. Bob (1946) 29 Cal.2d 321, 325 [175 P.2d 12].) Because the rule excluding hearsay is based on these particular difficulties in assessing the credibility of statements made outside the jury’s presence, the focus of the rule’s several exceptions is also on the reliability of the out-of-court declaration. Thus, the various hearsay exceptions generally reflect situations in which circumstances affording some assurance of trustworthiness compensate for the absence of the oath, cross-examination, and jury observation, (Chambers v. Mississippi, supra, 410 U.S. at pp. 298-299 [35 L.Ed.2d at pp. 310-311].) Neither the hearsay rule nor its exceptions are concerned with the credibility of witnesses who testify directly to the jury. When evidence is offered under one of the hearsay exceptions, the trial court must determine, as preliminary facts, both that the out-of-court declarant made the statement as represented, and that the statement meets certain standards of trustworthiness. (See legis. committee com., 29B West’s Ann. Evid. Code (1966 ed.) § 403, p. 268.) The first determination—whether the declaration was made as represented—is governed by the substantial evidence rule. The trial court is to determine only whether there is evidence sufficient to sustain a finding that the statement was made. (Ibid.) As with other facts, the direct testimony of a single witness is sufficient to support a finding unless the testimony is physically impossible or its falsity is apparent “without resorting to inferences or deductions.” (People v. Huston (1943) 21 Cal.2d 690, 693 [134 P.2d 758]; accord, People v. Jones (1990) 51 Cal.3d 294, 314-316 [270 Cal.Rptr. 611, 792 P.2d 643]; People v. Thornton (1974) 11 Cal.3d 738, 754 [114 Cal.Rptr. 467, 523 P.2d 267].) Except in these rare instances of demonstrable falsity, doubts about the credibility of the in-court witness should be left for the jury’s resolution; such doubts do not afford a ground for refusing to admit evidence under the hearsay exception for statements against penal interest. (See U.S. v. Seeley (1st Cir. 1989) 892 F.2d 1, 3; Comment, Statements Against Penal Interest (1978) 66 Cal.L.Rev. 1189, 1205, fn. 99; Note, Declarations Against Penal Interest (1976) 56 B.U.L. Rev. 148, 178-179; 2 McCormick on Evidence (4th ed. 1992) § 318, p. 342, fn. 10.) 3. Evidence Code section 352 When an objection to evidence is raised under Evidence Code section 352, the trial court is required to weigh the evidence’s probative value against the dangers of prejudice, confusion, and undue time consumption. Unless these dangers “substantially outweigh” probative value, the objection must be overruled. (See People v. Babbitt (1988) 45 Cal.3d 660, 688 [248 Cal.Rptr. 69, 755 P.2d 253].) On appeal, the ruling is reviewed for abuse of discretion. (People v. Ashmus (1991) 54 Cal.3d 932, 973 [2 Cal.Rptr.2d 112, 820 P.2d 214].) Here, no claim is made that permitting Culver to testify would have taken an undue amount of time. Culver’s testimony out of the jury’s presence, including a thorough cross-examination, did not take long, and the prosecutor did not represent that rebuttal witnesses would be required. Nor is there any apparent danger of confusion of the issues. Culver’s testimony would not even have introduced the issue of Gregory’s possible culpability for the murder of Amelia P. The issue was already there, as defense counsel had made clear from the outset of trial; Gregory’s culpability constituted the primary defense. (See People v. McAlpin (1991) 53 Cal.3d 1289, 1310, fn. 15 [283 Cal.Rptr. 382, 812 P.2d 563].) The evidence had substantial probative value. To withstand a challenge under Evidence Code section 352, evidence of a third party’s culpability “need only be capable of raising a reasonable doubt of [the] defendant’s guilt.” (People v. Hall (1986) 41 Cal.3d 826, 833 [283 Cal.Rptr. 382, 812 P.2d 563].) Here, Culver would testify that Gregory, the other prime suspect in the case, had confessed to the murder within hours after the crime was committed and under circumstances providing substantial assurances that the confession was trustworthy. The issue of Gregory’s guilt was highly material: given Kevin P.’s testimony describing a single intruder, and given also the single set of shoe prints leading away from the victim’s residence, proof of Gregory’s guilt would exonerate defendant. Thus, Culver’s testimony raised the requisite reasonable doubt of defendant’s guilt. Finally, the evidence was highly necessary: although there was other evidence tending to cast suspicion on Gregory, there was no comparable direct evidence of Gregory’s guilt. Gregory’s decision to exercise his privilege against self-incrimination precluded the defense from calling Gregory as a witness. Nor was there any danger of “undue prejudice” to the prosecution. The evidence was not likely “to arouse the emotions of the jurors” or “to be used in some manner unrelated to the issue on which it was admissible.” (People v. Edelbacher (1989) 47 Cal.3d 983, 1016 [254 Cal.Rptr. 586, 766 P.2d 1]; see also, People v. Farmer (1989) 47 Cal.3d 888, 912 [254 Cal.Rptr. 508, 765 P.2d 940]; People v. Karis (1988) 46 Cal.3d 612, 638 [250 Cal.Rptr. 659, 758 P.2d 1189].) As noted, the trial court apparently concluded that the evidence was more prejudicial than probative because Culver was not a credible witness. However, such doubts, however legitimate, do not constitute “prejudice” under Evidence Code section 352. (See People v. Alcala (1992) 4 Cal.4th 742, 791 [15 Cal.Rptr.2d 432, 842 P.2d 1192].) We have warned trial courts to avoid hasty conclusions that third-party-culpability evidence is “incredible”; this determination, we have affirmed, “is properly the province of the jury.” (People v. Hall, supra, 41 Cal.3d at p. 834.) Unlike other cases in which similar evidence was excluded for lack of credibility (e.g., People v. Blankenship (1985) 167 Cal.App.3d 840, 849 [213 Cal.Rptr. 666]; People v. Martin, supra, 150 Cal.App.3d 148, 162; People v. Chapman, supra, 50 Cal.App.3d 872, 878), nothing in the record indicates that Culver’s testimony was motivated by threats or bribery or expectation of personal advantage. We conclude that doubts about Culver’s credibility, though reasonable and legitimate, did not provide a sufficient basis to exclude his testimony. In sustaining the prosecutor’s objection to this evidence, the trial court abused its discretion. 4. Constitutional claims; standard of prejudice Defendant urges that the trial court’s exclusion of Culver’s testimony usurped his federal due process and fair trial rights. In essence, defendant complains he was unconstitutionally deprived of the right to present a defense. Hence, he reasons, the prejudicial effect of the error must be measured under the constitutional standard of Chapman v. California (1967) 386 U.S. 18, 24 [17 L.Ed.2d 705, 710-711, 87 S.Ct. 824, 24 A.L.R.3d 1065] (reversal required unless error harmless beyond reasonable doubt). We find no constitutional violation. “As a general matter, the ordinary rules of evidence do not impermissibly infringe on the accused’s [constitutional] right to present a defense. Courts retain ... a traditional and intrinsic power to exercise discretion to control the admission of evidence in the interests of orderly procedure and the avoidance of prejudice. [Citations.] . . . [T]his principle applies perforce to evidence of third-party culpability . . . .” (People v. Hall, supra, 41 Cal.3d 826, 834-835.) It follows, for the most part, that the mere erroneous exercise of discretion under such “normal” rules does not implicate the federal Constitution. Even in capital cases, we have consistently assumed that when. a trial court misapplies Evidence Code section 352 to exclude defense evidence, including third-party-culpability evidence, the applicable standard of prejudice is that for state law error, as set forth in People v. Watson (1956) 46 Cal.2d 818, 836 [299 P.2d 243] (error harmless if it does not appear reasonably probable verdict was affected). (E.g., People v. Alcala, supra, 4 Cal.4th 742, 791; People v. Babbitt, supra, 45 Cal.3d 660, 688; People v. Hall, supra, 41 Cal.3d at p. 836; People v. Wright (1985) 39 Cal.3d 576, 585-586 [217 Cal.Rptr. 212, 703 P.2d 1106].) Justice Kennard, in her dissent, urges that by barring a crucial defense witness as “incredible,” the trial court unconstitutionally invaded the jury’s function and denied defendant his right, under the compulsory process clause of the Sixth Amendment, to present witnesses in his behalf. The United States Supreme Court has held that the constitutional right to present and confront material witnesses may be infringed by general rules of evidence or procedure which preclude material testimony or pertinent cross-examination for arbitrary reasons, such as unwarranted and overbroad assumptions of untrustworthiness. However, the high court has never suggested that a trial court commits constitutional error whenever it individually assesses and rejects a material defense witness as incredible. (See, e.g., Michigan v. Lucas (1991) 500 U.S. 145 [114 L.Ed.2d 205, 111 S.Ct. 1743] [preclusive effect of statutory notice-of-evidence requirement in rape case]; Taylor v. Illinois (1988) 484 U.S. 400 [98 L.Ed.2d 798, 108 S.Ct. 646] [sanction of preclusion for defense violation of discovery rules]; Rock v. Arkansas (1987) 483 U.S. 44 [97 L.Ed.2d 37, 107 S.Ct. 2704] [exclusion of accused’s own testimony under state rule disallowing all hypnotically refreshed evidence]; Green v. Georgia (1979) 442 U.S. 95 [60 L.Ed.2d 738, 99 S.Ct. 2150] [absolute state failure to recognize hearsay exception for declarations against penal interest]; Davis v. Alaska (1974) 415 U.S. 308 [39 L.Ed.2d 347, 94 S.Ct. 1105] [denial of cross-examination for bias based on state rule making evidence of juvenile proceedings inadmissible in adult court]; Chambers v. Mississippi, supra, 410 U.S. 284 [state rule precluding cross-examination of party’s own witness]; Washington v. Texas (1967) 388 U.S. 14 [18 L.Ed.2d 1019, 87 S.Ct. 1920] [state rule precluding accomplice from testifying for defense]; but cf. Delaware v. Van Arsdall (1986) 475 U.S. 673 [89 L.Ed.2d 674, 106 S.Ct. 1431] [preclusion of cross-examination for bias, based upon individual assessment of probative value against prejudice, violated confrontation clause].) We reiterate that in general under California law, the credibility of individual witnesses “is properly the province of the jury.” (Hall, supra, 41 Cal.3d at p. 834.) Nonetheless, absent clearer guidance from above, we will not lightly assume that a trial court invites federal constitutional scrutiny each and every time it decides, on the basis of the particular circumstances, to exclude a defense witness as unworthy of credit. We decline to extend the federal decisions in the manner proposed by defendant and in Justice Kennard’s dissent. We conclude that the Watson standard of prejudice applies to the trial court’s mistake. 5. Prejudice Applying the Watson standard, we conclude that exclusion of Culver’s testimony, though erroneous, was harmless because it is not reasonably probable that admission of the testimony would have affected the outcome. We recognize that Gregory was the other prime suspect in the murder, and he disclosed accurate crime-scene details, which he told the police defendant had revealed to him. Moreover, Kevin P., the only eyewitness, never identified the assailant and gave a description which more closely resembled Gregory than defendant. Some other evidence was consistent with Gregory’s guilt as well as defendant’s. Yet the inference that defendant, not Gregory, was the murderer was extremely strong. Trapped by a semen sample that included defendant but excluded all other known potential donors, including Gregory, defendant was forced to admit that he was present at the crime scene on the morning of the murder, and that he had sex with the victim. The physical evidence, in particular the shoe prints leading to and from the victim’s home, strongly suggested there had been only one visitor during that morning. Just as important, Kevin described only one éntry, by the man who robbed his mother. By contrast, defendant’s uncorroborated effort to provide an innocent explanation for his presence in the victim’s house was not convincing. Defendant testified he had encountered the victim purchasing cocaine on two prior occasions, and that she traded cocaine for sex on the day of the murder. However, these claims contravened all other evidence about the victim’s life-style and values. The victim’s husband testified that she never exhibited signs of drug use during a 13-year marriage, and there was no cocaine in her blood at the time of her death. Moreover, the victim’s family was on a tight budget and managed its money carefully; the victim’s husband noticed no unusual withdrawals from the family account. It also seems unlikely that the victim, a housewife and mother, would have engaged in casual sex and drug activity in her living room with a near stranger while her five-year-old son was at home. Defendant’s version of events failed to mention or explain Kevin’s presence during the alleged sex-for-drugs encounter. The implausibility of defendant’s account enhanced the inference that he was involved in the homicide. Finally, as the trial court surmised, both Culver’s testimony and the hearsay confession it recounted had obvious indicia of unreliability. Though he knew the entire Cudjo family, Culver was a particular friend of defendant and thus had a motive to lie. Moreover, Gregory’s purported jailhouse confession contravened both the physical evidence and all other accounts Gregory had given, including his testimony under oath at the preliminary hearing. According to Culver, Gregory said that as he was entering the victim’s home to burglarize it, the victim came upon him by surprise, whereupon he “tripped” and immediately began beating her with a hammer. As previously noted, however, the crime-scene evidence made clear that the victim was carefully hog-tied in her bedroom before she was beaten and killed. When asked whether Gregory had mentioned anybody else in the house, Culver admitted that Gregory had originally failed to account for this crucial detail. However, Culver claimed that in a courthouse conversation just minutes before Culver took the stand, Gregory belatedly mentioned that there “probably was a little boy or somebody . . . .” This claim is suspect. It strains common sense that Gregory willingly provided additional details to Culver at a moment when he must have known Culver was about to give incriminating testimony against him. In all his other known statements and sworn testimony, Gregory insisted he had no involvement in the homicide. Moreover, after observing Culver’s demeanor and hearing his testimony, the trial court concluded that Culver was a patently incredible witness. Under all these circumstances, the chance that a competent jury would have given Culver’s testimony substantial weight seems remote. Accordingly, it is not reasonably probable that admission of his testimony would have affected the outcome. No basis for reversal appears. B. Admission of Gregory Cudjo’s Preliminary Hearing Testimony The prosecution had intended to call Gregory Cudjo as a witness during the case-in-chief. Because Gregory was a potential suspect in the murder of Amelia P., the trial court appointed counsel to advise him. After conferring with counsel, Gregory decided to assert his privilege against self-incrimination (U.S. Const., 5th Amend.; Cal. Const., art. I, § 15) and to refuse to answer any questions relating to the murder. The prosecution then announced its intention to offer in evidence, under the former testimony exception to the hearsay rule (see Evid. Code, §§ 1200, 1291), the testimony Gregory had given at the preliminary hearing. After Gregory had asserted his privilege against self-incrimination during a nonjury hearing, the trial court found that Gregory was unavailable as a witness (id., § 240), and it overruled the defense objection to Gregory’s former testimony. When proceedings with the jury resumed, the transcript of Gregory’s preliminary hearing testimony was read aloud. Here is what the transcript revealed: Called as a prosecution witness at the preliminary hearing, Gregory had at first testified that on the morning of Amelia P.’s murder, and throughout that day, defendant had worn long pants and boots; that defendant had remained in the camper with Gregory from the time Gregory awoke, between 9:30 and 10 a.m., until their mother arrived and the three of them went together to the house of Julia Watson; and that Gregory had not seen defendant washing his tennis shoes at Watson’s house. Under further questioning, including references to his previous interviews with sheriff’s investigators, Gregory had testified that he could not be sure that defendant had remained in the camper during the late morning hours because he (Gregory) had fallen asleep again for most of this time, and that defendant had later told Gregory he had been jogging that morning. But Gregory denied that he had ever told sheriff’s investigators that he had seen defendant leave the camper that morning, that defendant had been wearing cut-off jeans and tennis shoes, or that defendant had later washed his shoes at Watson’s house. Without objection, the prosecutor at the preliminary hearing had then played part of a tape recording of two sheriff’s investigators interviewing Gregory on the day following the murder. During the portion of the taped interview that was played, Gregory had said that defendant had been gone from the camper for two hours on the morning of the murder, that defendant had worn cut-off jeans and white tennis shoes that morning, that at Watson’s house defendant had taken off his tennis shoes and washed them, and that defendant had later changed into long pants and boots. After the tape had been played, Gregory had testified that he remembered the conversation with the sheriff’s investigators, that hearing the tape had refreshed his recollection, that he had not lied to the investigators and had told them what he knew, and that he did not disagree with any of the things he had told the officers. Defendant now contends: (1) his trial counsel was ineffective for failing to object at the preliminary hearing to the playing of the tape recording of the interview; (2) his trial counsel was ineffective for failing to request a jury instruction that Gregory’s taped statements could not be considered for the truth of the matters asserted; (3) the trial court erred in finding Gregory unavailable as a witness; (4) admission of Gregory’s preliminary hearing testimony denied defendant his right of confrontation; (5) the prosecutor’s failure to grant immunity to Gregory violated various constitutional rights of defendant; and (6) the trial court should have told the jurors why Gregory was not appearing before them to testify. 1. Ineffective assistance at preliminary hearing A criminal defendant has a constitutional right to the assistance of counsel (U.S. Const., 6th and 14th Amends.; Cal. Const., aft. I, § 15). This right to counsel extends to every critical stage of the proceeding, including the preliminary hearing. (Coleman v. Alabama (1970) 399 U.S. 1, 9-10 [26 L.Ed.2d 387, 396-397, 90 S.Ct. 1999] (lead opn. of Brennan, J.); id. at p. 11 [26 L.Ed.2d at pp. 397-398] (conc. opn. of Black, J.).) The right comprehends more than just the formality of representation by a lawyer; it entitles the defendant to competent and effective legal assistance. (United States v. Cronic (1984) 466 U.S. 648, 654-655 [80 L.Ed.2d 657, 664-666, 104 S.Ct. 2039]; People v. Ledesma (1987) 43 Cal.3d 171, 215 [233 Cal.Rptr. 404, 729 P.2d 839].) A claim of ineffective assistance of counsel is evaluated by well-established standards. A defendant seeking relief on the basis of ineffective assistance must show both that trial counsel failed to act in a manner to be expected of reasonably competent attorneys acting as diligent advocates, and that it is reasonably probable a more favorable determination would have resulted in the absence of counsel’s failings. (People v. Fosselman (1983) 33 Cal.3d 572, 584 [189 Cal.Rptr. 855, 659 P.2d 1144]; see also Strickland v. Washington (1984) 466 U.S. 668, 687-696 [80 L.Ed.2d 674, 693-699, 104 S.Ct. 2052].) Here, defendant has failed to show that a reasonably competent attorney, acting as a diligent advocate, would have objected at the preliminary hearing to introduction of evidence of the taped interview with Gregory. Although hearsay (Evid. Code, § 1200), the evidence was admissible under the hearsay rule exceptions for inconsistent statements (id.., § 1235) and past recollection recorded (id., § 1237). Because there was no sound legal basis for objection, counsel’s failure to object to the admission of the evidence cannot establish ineffective assistance. 2. Ineffective assistance at trial Defendant faults his trial counsel for not asking the trial court to instruct the jury that Gregory’s taped statements could not be considered for the truth of the matters asserted. He relies on the Law Revision Commission’s comment to Evidence Code section 1202, stating that although Evidence Code section 1235 permits a finder of fact to consider a trial witness’s inconsistent statement for the truth of the matter stated, no similar hearsay exception applies to the inconsistent statements of a hearsay declarant. (Cal. Law Revision Com. com., 29B West’s Ann. Evid. Code (1979 ed.) § 1202, p. 62.) What defendant’s argument overlooks is that after his taped statements were played at the preliminary hearing, Gregory testified that the tape had refreshed his recollection, that he had not lied to the investigators and had told them what he knew, and that he did not disagree with any of the things he had told the officers. Because Gregory in this way adopted and reaffirmed the substance of his statements to the officers, the jury was entitled to consider those statements for their truth under Evidence Code section 1291 as part of Gregory’s former testimony. An instruction correctly explaining this situation to the jury would not have benefited the defense. 3. Gregory’s unavailability as a witness A person is unavailable as a witness if the person is “[e]xempted or precluded on the ground of privilege from testifying concerning the matter to which his or her statement is relevant.” (Evid. Code, § 240, subd. (a)(1).) One such privilege, the exercise of which makes a person unavailable as a witness, is the constitutional privilege against self-incrimination. (People v. Gordon (1990) 50 Cal.3d 1223, 1251 [270 Cal.Rptr. 451, 792 P.2d 251].) To be found unavailable on this ground, a witness must not only intend to assert the privilege, but also be entitled to assert it. (People v. Ford (1988) 45 Cal.3d 431, 440-441 [247 Cal.Rptr. 121, 754 P.2d 168, 76 A.L.R.4th 785].) Here, Gregory demonstrated his intention to assert the privilege when he was called to testify during a foundational hearing out of the jury’s presence. After Gregory was sworn, the prosecutor asked whether Gregory intended to answer any questions about the murder of Amelia P., and whether he had conversed with defendant about a crime defendant had committed near the Cudjo camper on the day of the murder. Gregory refused to answer each question, expressly grounding his refusal on the privilege against self-incrimination. Defense counsel then stipulated that Gregory would assert the privilege “as to any testimony he may give in this matter.” Defendant argues that even though Gregory intended to assert the privilege, Gregory did not sufficiently establish that he was entitled to do so. We disagree. To invoke the privilege, a witness need not be guilty of any offense; rather, the privilege is properly invoked whenever the witness’s answers “would furnish a link in the chain of evidence needed to prosecute” the witness for a criminal offense. (Hoffman v. United States (1951) 341 U.S. 479, 486 [95 L.Ed. 1118, 1123-1124, 71 S.Ct. 814]; see also People v. Mincey (1992) 2 Cal.4th 408, 441 [6 Cal.Rptr.2d 822, 827 P.2d 388].) To satisfy this standard, “it need only be evident from the implications of the question, in the setting in which it is asked, that a responsive answer to the question or an explanation of why it cannot be answered might be dangerous because injurious disclosure could result.” (Hoffman v. United States, supra, at pp. 486-487 [95 L.Ed.2d at pp. 1123-1124].) Consistent with these principles, our Evidence Code provides that when a witness grounds a refusal to testify on the privilege against self-incrimination, a trial court may compel the witness to answer only if it “clearly appears to the court” that the proposed testimony “cannot possibly have a tendency to incriminate the person claiming the privilege.” (Evid. Code, § 404.) Here, it did not “clearly appear” that Gregory’s proposed testimony could not have tended to incriminate him for the murder of Amelia P. Gregory had been taken into custody as a suspect in that offense. Indeed, defendant has argued, both at trial and on this appeal, that the evidence is entirely consistent with the hypothesis that Gregory, rather than defendant, killed Amelia P. Answers to the prosecution’s questions about Gregory’s observations on the day of the murder, and Gregory’s conversations with defendant relating to the murder, could have developed evidence tending to establish Gregory’s own complicity in the victim’s death. (See People v. Sipress (1975) 51 Cal.App.3d 98, 102 [123 Cal.Rptr. 884]; People v. Traylor (1972) 23 Cal.App.3d 323, 330 [100 Cal.Rptr. 116].) Moreover, because Gregory had testified at the preliminary hearing, he could properly invoke the privilege to avoid exposing himself to a charge of perjury in that proceeding. (People v. Maxwell (1979) 94 Cal.App.3d 562, 570-571 [156 Cal.Rptr. 630].) The trial court did not err in finding Gregory unavailable as a witness on the ground of privilege. 4. The right of confrontation Both the state and federal Constitutions guarantee criminal defendants the right to confront the witnesses against them. (U.S. Const., 6th Amend.; Cal. Const., art. I, § 15.) The right of confrontation is not absolute, however; in particular, it does not preclude the prosecution from proving its case through the prior testimony of a witness who is unavailable at trial, so long as the defendant had the right and the opportunity to cross-examine the witness during the earlier proceeding at which the witness gave this testimony. (Barber v. Page (1968) 390 U.S. 719, 722 [20 L.Ed.2d 255, 258-259, 88 S.Ct. 1318]; People v. Alcala, supra, 4 Cal.4th 742, 784-785.) Here, defendant maintains that his right of confrontation was denied by the prosecution’s use of Gregory’s preliminary hearing testimony. Although his attorney did cross-examine Gregory at the preliminary hearing, defendant maintains that he did not have a fair opportunity to cross-examine because Gregory’s ability to think and respond coherently had been impaired by the ingestion of some drug or drugs. The record before us does not support defendant’s contention. During the preliminary hearing, Gregory’s competence as a witness was not challenged. Gregory was not asked at the preliminary hearing whether he had taken drugs, and no evidence on that subject was introduced at the preliminary hearing. Although at trial defense counsel voiced his opinion that Gregory had been under the influence of drugs at the time of his preliminary hearing, he provided no evidence to support the claim. Even if we assume that Gregory had ingested some drug, moreover, it does not appear that Gregory’s mental functioning was so impaired as to preclude meaningful cross-examination. Gregory’s testimony at the preliminary hearing was lucid and responsive to the questions asked. Although his testimony was internally inconsistent, this does not appear to have been the result of inability on his part to comprehend the questions or to understand his duty as a witness to tell the truth. Rather, it appears that Gregory was reluctant to give evidence damaging to defendant and did so only under the pressure of the prosecutor’s examination and after listening to the tape recording of his prior interview. The failure of defense counsel to cross-examine more vigorously may be explained as a tactical decision. Gregory had already impeached himself by giving contradictory testimony, and further probing could have resulted in testimony more damaging to defendant. The trial court did not err, therefore, in concluding that defendant had a fair opportunity to cross-examine Gregory at the preliminary hearing. Defendant has not established a violation of his right of confrontation. 5. Failure to grant immunity Defendant contends that by not granting immunity to Gregory, and thereby removing the self-incrimination barrier to Gregory’s testimony at defendant’s trial, the prosecution violated defendant’s constitutional right of confrontation and denied him due process of law. (U.S. Const., 5th, 6th, & 14th Amends.; Cal. Const., art. I, §§ 7, 15.) At no time during proceedings in the trial court did the defense request immunity for Gregory, nor did the defense make an offer of proof as to Gregory’s testimony. Because the issue of immunity was not raised at trial, it is not preserved for review on appeal. (People v. Sutter (1982) 134 Cal.App.3d 806, 813 [184 Cal.Rptr. 829]; People v. Sipress, supra, 51 Cal.App.3d 98, 102.) Moreover, there is no authority in this state for the proposition that a prosecutor must request or the trial court must grant immunity to a witness on the ground that the witness’s testimony could be favorable to the defense. (See People v. Hunter (1989) 49 Cal.3d 957, 973 [264 Cal.Rptr. 367, 782 P.2d 608]; People v. Jackson (1986) 178 Cal.App.3d 694, 700 [224 Cal.Rptr. 37]; People v. DeFreitas (1983) 140 Cal.App.3d 835, 841 [189 Cal.Rptr. 814].) In Hunter, supra, we assumed without deciding that in appropriate circumstances judicially conferred use immunity might be necessary “to vindicate a criminal defendant’s rights to compulsory process and a fair trial[.]” (Hunter, supra, at p. 974.) But we also said that such immunity would be required only if the witness’s testimony was both clearly exculpatory and essential to an effective defense, and if no strong governmental interest weighed against the grant of immunity. (Ibid.) Here, defendant has not demonstrated that Gregory’s testimony would have been clearly exculpatory or that it would have differed from his preliminary hearing testimony. And, because the issue was never raised at trial, the record is inadequate to determine whether a strong governmental interest would have weighed against a grant of immunity. Thus, defendant has failed to demonstrate the existence of circumstances in which a trial court might be required to confer use immunity to ensure a fair trial. 6. Failure to inform the jury Defendant contends that the trial court should have either informed the jury of Gregory’s refusal to testify or compelled Gregory to claim the privilege against self-incrimination in the jury’s presence. We reject this contention. As we have explained in previous opinions, permitting the jury to learn that a witness has invoked the privilege against self-incrimination serves no legitimate purpose and may cause the jury to draw an improper inference of the witness’s guilt or complicity in the charged offense. (People v. Hill (1992) 3 Cal.4th 959, 992 [13 Cal.Rptr.2d 475, 839 P.2d 984]; People v. Mincey, supra, 2 Cal.4th 408, 441; People v. Frierson, supra, 53 Cal.3d 730, 743.) C. Failure to Grant Immunity to Defense Witness Mitchell The defense had James Mitchell, a state prison inmate, brought to court to testify in defendant’s trial. At defense counsel’s suggestion, the court appointed an attorney to advise Mitchell. After conferring with counsel, Mitchell decided not to testify and, instead, to exercise his privilege against self-incrimination, unless he received immunity. Mitchell’s counsel conveyed this decision to the prosecutor. At a hearing held outside the jury’s presence, the prosecutor announced that he would not request immunity for Mitchell, noting that he did not even know the subject of Mitchell’s proposed testimony. Defense counsel offered to provide this information, but the prosecutor said it would make no difference to his decision. The trial court stated that it could not compel the prosecutor to request immunity. Defense counsel then said there was no point in calling Mitchell to the stand, even out of the jury’s presence, when it was apparent that he would refuse to testify. The defense did not ask the court to grant immunity, nor did the defense make an offer of proof as to the testimony Mitchell would have given had he received immunity. Based on these facts, defendant contends: (1) the prosecutor improperly failed to request immunity for Mitchell; (2) the trial court erred in failing to grant Mitchell judicial immunity; (3) the trial court erred in failing to require that Mitchell assert under oath the privilege against self-incrimination; and (4) defense counsel’s failure to call Mitchell to the stand constituted ineffective assistance of counsel. As we have previously explained, no court in this state has ever decided that granting a defense witness immunity from prosecution for his or her testimony was essential “to vindicate a criminal defendant’s rights to compulsory process and a fair trial.” (People v. Hunter, supra, 49 Cal.3d 957, 974.) This court has explained that if immunity for a defense witness is ever constitutionally compelled, it is so compelled only when the witness’s testimony is both clearly exculpatory and essential to an effective defense, and when no strong governmental interest weighs against the grant of immunity. (Ibid.) Because the defense made no offer of proof as to Mitchell’s testimony, the record before us on this appeal provides no basis for determining that his testimony was either clearly exculpatory or essential to an effective defense. Therefore, defendant has not shown that failure to grant Mitchell immunity resulted in the denial of defendant’s rights to compulsory process and a fair trial. Also unavailing are defendant’s related contentions, that the trial court on its own initiative should have compelled Mitchell to assert under oath his privilege against self-incrimination, and that defense counsel’s failure to call Mitchell to the stand constituted ineffective assistance. After talking with both Mitchell