Petitioner Gregory Caliendo appeals the district court’s denial of his petition for writ of habeas corpus. He contends that the California Court of Appeal’s decision upholding his conviction was contrary to Supreme Court precedent because the court did not presume prejudice from an incident of juror misconduct. A detective who provided testimony that was crucial to the prosecution’s case had a twenty-minute conversation, factually unrelated to the trial, with three jurors in the hallway during a break in deliberations.
We exercise jurisdiction under 28 U.S.C. § 2253 and 28 U.S.C. § 1291. We hold that the state appellate court’s decision was contrary to
Mattox v. United States,
*693 I. FACTS
After a Los Angeles County Superior Court jury convicted him of second-degree auto burglary in violation of California Penal Code section 459, Caliendo was sentenced to a state prison term' of twenty-five years to life in accordance with California’s three strikes law. His conviction resulted from a second trial; the jury in Caliendo’s first trial hung 7-5 in favor of acquittal.
The central issue at both trials was whether Caliendo broke into a locked parked car — an essential element of auto burglary — or whether the car 'had previously been broken into when he entered it. Caliendo was arrested at 12:30 a.m. on July 22, 1995. Two sheriffs deputies noticed someone sitting in the passenger seat of a GMC Suburban in a park and ride lot. Moments later, the deputies shined a spotlight on the car, approached it on foot, and illuminated the interior with their flashlights. They reported seeing Caliendo lying on his side with his head under the driver’s side dashboard and a screwdriver in his right hand. A window on the passenger side was broken.' The front and back doors on the passenger side were unlocked. When Caliendo stepped out of the vehicle, the deputies found the screwdriver and a large rock on the floor. The car had been parked there for two days: The owner was shown his car in the impound lot. He said that the rear right speaker had been unscrewed and that the car’s sun visors and light bar were missing, along with an overnight bag containing clothes and about $30. Caliendo possessed none of these items when he was taken into custody directly from the car. He told the two deputies that he did not break into the car but that it was unlocked and he crawled inside it to go to sleep. 1
The only evidence that Caliendo broke into the car was supplied by a police detective, John Mundell, who testified that Cal-iendo confessed this to him two days after the arrest, on July 24, 1995. According to Mundell, Caliendo said that following an argument his wife dropped him off at the intersection near the park and ride lot between 11 p.m. and midnight on the night of his arrest. Mundell testified that Cal-iendo said he got cold and needed a place to sleep, so he broke the Suburban’s window by smashing it three times with a large rock, unlocked the door, crawled inside, and went to sleep. Caliendo denied having a screwdriver in his hand when the deputies found him.
Mundell, an officer with eight years’- experience, sat at the prosecution table throughout the trial. He was overheard talking to three jurors in the hallway outside the courtroom for approximately twenty minutes while they waited to enter the courtroom after a lunch recess during deliberations in Caliendo’s second trial.
The trial judge immediately conducted an evidentiary hearing. Mundell and the jurors testified that they did not discuss anything related to the trial. The topics of conversation included baseball, eating, a juror’s neighbor, Mundell’s exercise habits and equipment, and his heavy police workload:
“THE COURT: Mr. 005, what were you talking about?
JUROR.NO. 5: We talked about the amount of paperwork on Detective Mun-dell’s desk top and his exercise regime and the fact that he doesn’t have a television in his house where he works out.
*694 THE COURT: Mr. 004, what were you talking about?
JUROR NO. 4: We talked about eating, and he has to pay so much money to eat here all the time, .and that he’s doing a good job as an officer; in, other words, I wouldn’t want to be in his possession [sic] to be a cop or officer. I was talking about baseball. I was talking about my neighbor. That’s it. Just surface talk. THE COURT: Ms. 022, what were you talking about?
JUROR NO. 9: I asked him how long he thought it would be before we would get back into court to start deliberating.”
At the evidentiary hearing, the judge questioned all the' jurors one by one as to whether the conversation would influence their judgment or cause them to view Mundell’s testimony any .differently. All the jurors testified that the conversation would not affect their deliberations.
Caliendo moved for a mistrial. The judge denied the motion as follows:
“THE COURT: [The jurors] have all indicated ... that the conversation that they had with Detective Mundell will not influence their judgment in this case as to Mr. Caliendo. I will accept their representations. I accept everybody’s representation. I’ve heard no indication whatsoever that anything abput the fact;s of the ease or any of the parties in this case were discussed whatsoever. I know what you’re saying. It’s a very unfortunate situation. It should not have happened but it did happen. Detective Mundell should know better. He certainly should have known better.
“But I will accept the jurors at their word that they will not let whatever conversation they had with Detective Mundell influence their judgment in the case as to whether or not Mr. Caliendo, based upon the evidence that has been introduced here in court, is either guilty or not guilty of these charges. So the motion for a mistrial will be denied.”
, The jury began deliberating shortly before the noon recess on Thursday, August 8, 1996. During deliberations the jury sent out a note requesting that portions of Mundell’s testimony be reread. On Monday, August 12, it returned with a guilty verdict. The judge denied Caliendo’s subsequent motion for a new trial.
Caliendo appealed. The California Court of Appeal observed that the conversation with Mundell was “improper and fraught with the danger of improper influence and communication of extraneous information.” Nevertheless, the court rejected Caliendo’s, juror misconduct claim on the grounds that he had not established actual prejudice on the facts. The California Supreme Court denied review.
Caliendo thén filed a petition for writ of habeas corpus. The district court, adopting the report, and recommendation of the Magistrate Judge, denied the petition on its merits with prejudice. The report and recommendation emphasized that the improper conversation was an “isolated incident” .and did not concern the trial. The ■district court,, however, granted a certificate of appealability with respect to the question whether prejudice should be presumed where three jurors had an improper '■ twenty-minute conversation, factually unrelated to the trial, with a key prosecution witness.
II. STANDARD OF REVIEW
We review
'de, novo
a district court’s decision to deny a habeas petition.
McClure v. Thompson,
Under the Antiterrorism and Effective Death Penalty Act of 1996 (“AEDPA”), 28 U.S.C. § 2254(d), a petitioner for writ of habeas corpus.must demonstrate that the state court’s. adjudication on -the merits resulted in a decision that was “contrary to, or involved an unreasonable application of, clearly established Federal law, as determined by the Supreme Court of the United States” or was “based on. an unreasonable determination of the facts in light of the evidence presented.” The state court’s decision is “contrary to” clearly established federal law if the state court “applies a rule that contradicts the governing law set forth in [Supreme Court] cases” or if it “confronts a set of facts that are materially indistinguishable from a decision of this Court and nevertheless arrives at a result different from our precedent.”
Early v. Packer,
III. ANALYSIS
Caliendo maintains that the California Court of Appeal’s decision was contrary to clearly established Supreme Court law because the court did not presume prejudice in evaluating the impact of the conversation between Detective Mundell and the three jurors.- We agree that the state court’s analysis was framed erroneously and grant the habeas petition based on our independent review of the record.
More than a century ago, in
Mattox v. United States,
In
Remmer v. United States,
*696
We and other circuits have held that
Mattox
established a bright-line rule: Any unauthorized communication between a juror and a witness or interested party is presumptively prejudicial, but the government may overcome the presumption by making a strong contrary showing.
United States v. Armstrong,
The
Mattox
rule serves an important function in our system of justice. It protects and safeguards defendants’ Sixth Amendment rights to a fair trial and to confront and cross-examine witnesses.
See Rinker v. County of Napa,
At the same time, the Supreme Court has recognized that “it is virtually impossible to shield jurors from every contact or influence that might theoretically affect their vote.”
Smith v. Phillips,
The
Mattox
rule applies when an unauthorized communication .with a juror crosses a low threshold to. create the potential for prejudice. A communication is possibly prejudicial, not
de minimis,
if it raises a risk of influencing the verdict. Prejudice is presumed under these circumstances, and the defendant’s motion for a new trial must be granted unless the prosecution shows that there is no reasonable possibility that the communication will influence the verdict.
See O’Brien,
The California Court of Appeal did not identify or apply thé clearly established
Mattox
rule. The court relied on the California Supreme Court’s decision in
People v. Cobb,
The state court’s failure to presume prejudice on this record was contrary to
Mattox.
The
Mattox
Court spoke in categorical terms, mandating that “possibly prejudicial” out-of-court communications between jurors and outside parties “invalidate the verdict, at least unless their harmlessness is made to appear.”
Mattox,
Whether an unauthorized communication between a juror and a third party concerned the case is but one factor in determining whether the communication raised a risk of influencing the verdict. Other factors may include the length and nature of the contact, the identity and role at trial of the parties involved, evidence of
*698
actual impact on the juror, and the possibility of eliminating prejudice through a limiting instruction. In weighing these factors we generally accord some deference to the findings of the trial judge, who is in the best position to determine whether possibly prejudicial misconduct took place and, if so, whether the government clearly established harmlessness.
See Williams,
This contact was possibly prejudicial because Detective Mundell was a critical prosecution witness and his interaction with multiple jurors lasted for twenty minutes. Although the conversation did not directly concern the trial, it went beyond “a mere inadvertent or accidental contact involving only an exchange of greeting in order to avoid an appearance of discourtesy.”
Harry Barfield,
The state courts determined that no prejudice resulted from the incident, yet we may not defer to this finding. AEDPA’s presumption of correctness does not apply to state court findings arrived at through the use of erroneous legal standards.
Fernandez v. Roe,
We hold that the government did not make a strong showing that the contact between Detective Mundell and the three jurors was harmless. While the twenty-minute conversation was seemingly innocuous, the case was close. And it turned on the detective’s credibility. The jury even requested a read-back of Mun-dell’s testimony as to damaging statements Caliendo had allegedly made to him. The
*699
report and recommendation adopted by the district court noted that “some evidence suggested that the car may have already been broken into before Petitioner entered it, that is, none of the missing property was found at the scene or in Petitioner’s possession when he was taken into custody directly from the vehicle.]’ Given the conflicting evidence in Caliendo’s case and the centrality of Mundell’s testimony to the prosecution, the jurors’ claims that the encounter would not influence them did not suffice to meet the government’s heavy burden of proving harmlessness. The prejudicial effect of an extrinsic contact “may be substantial even though it is not perceived by the juror, and ‘a juror’s good faith cannot counter this effect.’”
Jeffries v. Wood,
At Caliendo’s first trial seven jurors voted to acquit. At his second trial three deliberating jurors chatted amiably and at length with the critical prosecution witness in an uncontrolled setting. Detective Mundell discussed his heavy workload with the three jurors and established common ground with them. After the conversation Juror 4 expressed a positive view of the detective: “We talked about ... that he’s doing a good job as an officer.”
The government failed to clearly establish that the improper conversation did not affect the verdict by bolstering the detective’s credibility or “creating juror empathy.”
Rinker,
REVERSED AND REMANDED.
Notes
. The trial court in 'Caliendo’s second trial applied the hearsay rule to prevent the jury from hearing the deputies' testimony about this statement. The jury in the first trial was permitted to hear the testimony.
. In
Turner v. Louisiana,
. Despite the government’s contention, the Supreme Court's decision in
United States v. Olano,
. "[W]hen jury misconduct is alleged in the defendant’s motion for new trial, the trial judge has a duty to take the following actions: he must conduct a full investigation to ascertain whether the alleged jury misconduct actually occurred; if it occurred, he must determine whether or not it was prejudicial; unless he concludes that it was clearly not prejudicial, he must grant the motion for new trial; if he concludes that it did not occur or that it was clearly not prejudicial, he must spell out his findings with adequate specificity for meaningful appellate review.”
United States v. McKinney,
