Herbert Chipman was convicted of burglary in state court. Chipman’s conviction was upheld by the Third District Court of Appeal of the State of California, and a petition for hearing was denied by the California Supreme Court. Chipman then filed a petition for writ of habeas corpus in the United States District Court for the Eastern District of California. The district court granted the petition on the ground that Chipman’s sixth amendment right to confront witnesses was violated by the state trial court’s refusal to permit cross-examination of a witness for bias. We affirm.
The name of the witness in question was Mrs. Ketchum. She testified that Chipman was near the scene of the burglary under suspicious circumstances. There was no other eye witness testimony. Circumstantial evidence linked Chipman to the burglary, but Mrs. Ketchum’s testimony contributed significant additional information. She testified that she lived in the neighborhood and that on the night of the burglary she heard footsteps proceeding to and, later, from the victim’s house. She said she recognized them as Chipman’s because of the noise made by the platform shoes he often wore. She testified further that from her bedroom window she recognized Chipman clearly and saw him running while carrying a guitar case. A valuable guitar in its case was one of the items stolen from the victim’s house.
Counsel for the defense undertook an extensive cross-examination of Mrs. Ketchum to test her credibility, bias, and memory. During the examination, counsel asked Mrs. Ketchum if she had ever conversed with a neighbor named Mrs. Ford. A relevance objection being interposed, there was an extensive offer of proof. Defendant’s counsel said the question bore upon possible bias and prejudice that Mrs. Ketchum entertained. Counsel initially stated he wanted to show bias because Mrs. Ketchum disliked Mrs. Ford, who was Chipman’s aunt. There was a later and more elaborate offer of proof permitted by the trial court, however, both with reference to the first question *530 about Mrs. Ford and other questions pertaining to events involving Mrs. Ford, the defendant, and the witness Ketchum. The defense offered to show that Mrs. Ford operated a residential care facility for mentally ill and retarded persons. The facility was located across the street from Mrs. Ketchum’s house. Counsel offered to prove that Ketchum knew Chipman had lived in the facility, that Ketchum had previously accused residents of possessing stolen property, and that Ketchum had complained to the neighbors and circulated a petition to city officials in order to close the facility because it was not proper for the neighborhood and had undesirable occupants. It was the defense theory that by reason of her attitude and her former actions, Mrs. Ketchum might be hostile to or prejudiced against persons who had occupied the Ford house, including the defendant Chipman, and, moreover, that she stood to benefit if a former resident of the facility were convicted of burglary. The trial court rejected this more extensive offer of proof as well, stating the evidence would be excluded under Cal.Evid.Code § 352 1 on the ground that it was not probative of any personal hostility towards the defendant. The court did, however, permit defendant’s counsel to cross-examine Ketchum about her possible general racial bias.
The Sixth Amendment guarantees the right of a defendant to confront the witnesses against him or her.
Davis v. Alaska,
While the scope of cross-examination is within the discretion of the trial judge, this discretionary authority to limit cross-examination comes into play only after there has been permitted as a matter of right sufficient cross-examination to satisfy the Sixth Amendment.
Id.
at 908,
quoting United States v. Bass,
Confrontation questions must be resolved on a case-by-case basis based on examination of all circumstances and evidence.
United States v. Snow,
We have recognized that “some topics may be of such minimal relevance that the trial court would be justified either in totally prohibiting cross-examination about them or in allowing only limited questioning.”
Skinner v. Cardwell, supra,
Some kinds of animosities are so unlikely to color a witness’ testimony that the trial judge might properly exclude testimony regarding them. For example, the sole ground for attempting to show bias may be that the witness dislikes a relative of the defendant for reasons unrelated to the defendant, such as an ordinary neighborhood dispute. Absent further facts justifying questioning, the confrontation clause arguably might not require cross-examination on this subject. Here, the grounds for a suspicion of bias were considerably more extensive and better founded. 2
The present case involves a potential bias different from that in some other decisions, where the bias sought to be proved was that the witness favored the prosecution in hopes of better treatment for his own crimes. See, e. g., Davis v. Alaska, supra; Burr v. Sullivan, supra. These instances of potential bias appear with such frequency that the necessity to permit cross-examination should be readily apparent to the trial court. We concede that the instant case may not have presented such a routine application of the confrontation clause. Counsel have not directed us to, and we have not discovered, a case with facts re *532 sembling this one. Nevertheless, we think cross-examination here was required under principles sufficiently well established that it was a constitutional error to overlook them. See generally 3 J. Weinstein & M. Berger, Evidence § 607[03] (1978 & Supp. 1979); 3A J. Wigmore, Evidence §§ 940-53 (J. Chadbourn rev. 1970 & W. Reiser Supp. 1977); 3 D. Louisell & C. Mueller, Federal Evidence § 341 (1979), and cases cited therein.
It is true, as the state trial court pointed out, that the case does not involve allegations of particular enmity between the witness and the defendant.
See, e. g., United States v. Senak,
Cross-examination of Mrs. Ketchum for possible bias and prejudice was especially important because her testimony was very significant to the case. The circumstantial evidence to prove the crime was not overwhelming, and Mrs. Ketchum was the only eyewitness whose testimony could place the defendant at the scene. Her testimony, moreover, was not given in terms of a general description which happened to fit this defendant. Instead, she claimed to know precisely who the defendant was from having observed him on earlier occasions. Counsel should have been permitted to probe the circumstances in which Mrs. Ketchum had previously acquired her knowledge of the defendant when it was alleged that those circumstances affected her attitude and motives toward him. The witness had identified the defendant as someone who had resided in Mrs. Ford’s home. Defense counsel requested permission to inquire whether Mrs. Ketchum harbored a bias against Mrs. Ford and the residents of the facility, and in that connection to inquire whether she had sought to have the facility closed. Given this offer of proof, it was required that the defendant be permitted to examine the witness to determine if she harbored a bias or prejudice against the class composed of residents of the home.
There was a further possible source of bias which defense counsel had the right to explore, at least briefly. Defense counsel made an offer of proof, which all concede was in good faith, to show that Mrs. Ketchum had made statements accusing residents of the Ford home of possessing stolen property. The truth of that allegation, and the extent to which it might have affected Mrs. Ketchum’s views about the defendant, was also within the zone of potential bias or prejudice upon which inquiry by defense counsel should have been permitted. 3
Cross-examination for bias or prejudice is generally required only to the extent of exploring the subject with the witness, first in a preliminary way to determine if further inquiry is justified, and then *533 more extensively if the witness’ responses or attitude appear to justify it. The argument of the state that this line of examination necessarily would require time-consuming extrinsic evidence from other witnesses to rebut the inference of prejudice is without merit. The trial court retains discretion to control the length and extent of the examination, and, in appropriate cases, to confine examination to the witness who is being tested, see, e. g., Skinner v. Cardwell, supra. The essence of the confrontation violation here is that examination into sources of potential bias or prejudice was foreclosed in its entirety.
Confrontation clause doctrine appears to require reversal if there is any error; whether the error was harmless in the particular case in not considered.
Davis v. Alaska, supra; Skinner v. Cardwell, supra. But see Bleckner, supra,
We hold that the denial of cross-examination for bias or prejudice in this case violated the confrontation clause.
The district court’s order granting the writ is AFFIRMED.
Notes
. Cal.Evid.Code § 352 provides:
Discretion of court to exclude evidence. The court in its discretion may exclude evidence if its probative value is substantially outweighed by the probability that its admission will (a) necessitate undue consumption of time or (b) create substantial danger of undue prejudice, of confusing the issues, or of misleading the jury.
Federal appellate courts apply the same standard in reviewing a trial court’s exercise of discretion pursuant to rule 403 of the Federal Rules of Evidence as do California courts in reviewing a trial court’s ruling under California Evidence Code section 352.
See, e. g., Cain v. State Farm Mutual Auto. Ins. Co.,
. The unpublished decision of the state appellate court appears to have been based on the assumption that the only justification for the probe was the nephew-aunt relation. The appellate court offered no explicit ground to which we might give deference for excluding the probe for potential bias, based on the more extensive offer of proof. That expanded offer was considered by the state trial court and appears to have been timely.
. Some trial attorneys might decide to refrain from such questioning to avoid suggesting guilt, but those tactical decisions are for counsel. Once the defense chose to enter the area in this case, the confrontation clause required that some inquiry be allowed.
