ROGERS, J., delivered the opinion of the court, in which SUTTON, J., joined. CLAY, J. (pp. 714-18), delivered a separate opinion concurring in part and dissenting in part.
OPINION
ROGERS, Circuit Judge.We affirm the district court’s denial of Jarmaine Carroll’s habeas petition because the Michigan state courts did not unreasonably apply United States Supreme Court precedent in holding (1) that the state trial court adequately dealt with an incident of improper jury contact, and (2) that counsel for co-defendant could “stand in” for defendant’s counsel during rein-struction of the jury without violating defendant’s Sixth Amendment rights.
On November 7, 1997, Elisia Brocking-ton and two masked, armed intruders shot Samir Dawood in the leg during a robbery of the Eagle Market. Brockington, who admitted to being an accomplice in the crime, described to the police Carroll’s involvement in the robbery. The State of Michigan subsequently charged Carroll with several crimes, including armed robbery, assault with intent to commit murder, and conspiracy to commit armed robbery. He stood trial with codefendants William and Michael Thompkins.
On Thursday, May 6, 1999, the jury began deliberating the fate of Carroll and William Thompkins. (Michael Thompkins elected to have the trial judge decide his fate.) Two events pertaining to the jury’s deliberations are significant to this appeal. First, on the second day of deliberations, the jury requested that the trial judge reinstruct the jury on certain definitions and elements of the crimes. Carroll’s attorney, Richard Powers, who was absent during the start of the reinstructions, entered the courtroom towards the end of the trial court’s response to the jury’s request. At the end of the reinstruction, which was lengthier than the original instructions and included several examples, counsel for co-defendant, Regina D. Jemi-son, objected on behalf of codefendant and Carroll. The trial judge overruled the objection and acknowledged that counsel for co-defendant “stood in” for Carroll’s attorney, noting, “She did more than stood in, she stood up.”
The second relevant event occurred on Tuesday, May 11, 1999, when the trial court received a note from the jury that family members of one of the defendants harassed two jurors. Juror number 10 stated that, as she was waiting outside for someone to pick her up, a man walked past her and said he was going to “jack her.” The man then walked to a car, and looked back at the juror. This prompted her to reenter the building to wait for her ride. Juror number 11, meanwhile, stated that a female asked her for her name. Having heard these two jurors’ stories, the trial judge assured the jury that deputies would protect them.
An hour later, the jury convicted Carroll of conspiracy to commit armed robbery, and the trial judge asked the two jurors whether earlier events affected the verdict. Both jurors said that the earlier events did not affect their decisions as to defendants’ guilt. Carroll’s counsel did not ask for a more detailed investigation or propose a different procedure to investigate the incidents. The judge later sentenced Carroll to fifteen to thirty years. Defense counsel moved for a mistrial because of the contact with the jurors, which the state trial court rejected.
In an unpublished opinion, the Michigan Court of Appeals affirmed Carroll’s conviction, People v. Carroll, No. 220556, 2001 WL 1277422 (2001) and the Michigan *710Supreme Court subsequently denied Carroll leave to appeal. 466 Mich. 884, 646 N.W.2d 471 (2002). As to Carroll’s argument that the trial judge should have granted a mistrial because of jury tampering, the Court of Appeals noted that “the two jurors were not biased against” Carroll. As to Carroll’s right-to-counsel argument, the Michigan Court of Appeals noted that co-defendant’s counsel, who objected to the conspiracy instructions on behalf of both defendants, “stood in” for Carroll’s counsel during the reinstruction.
Carroll filed a petition for habeas relief, which the federal district court denied on October 18, 2004. The federal district court noted that, on the issue of investigating jury tampering, “the preferred course of action would have been to question the jurors individually regarding whether their impartiality was impacted by contact with the unknown persons rather than questioning the jurors together.” Nevertheless, the court held that “it cannot be said that the state court’s conclusion was contrary to or an unreasonable application of Supreme Court precedent.” As to Carroll’s denial of the right to counsel, the court noted that, while “it would have been prudent for the trial court to state on the record prior to reinstructing the jury that [counsel for co-defendant] was temporarily representing” Carroll, “the state court’s determination that [Carroll] was represented by counsel during reinstruction was not an unreasonable determination of the facts in light of the evidence, nor was it an unreasonable application of Supreme Court precedent.”1
The district court properly denied Carroll’s petition for habeas relief because the Michigan courts’ decisions did not involve an unreasonable application of clearly established Supreme Court precedent or result from an unreasonable determination of facts. A federal court may grant a writ of habeas corpus on behalf of a person in state custody only if the judgment of the state: “(1) 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 (2) resulted in a decision that was based on an unreasonable determination of the facts in light of the evidence presented in the State court proceeding.” 28 U.S.C. § 2254(d)(1) & (2).
I. The Michigan Court Did Not Unreasonably Apply Federal Law In Holding That The Trial Court Adequately Investigated Allegations Of Improper Contact With Jurors.
Carroll’s argument that the trial court failed to investigate, allegations of improper contact with jurors suffers from two serious flaws. First, the record simply does not support Carroll’s description of events, namely that the trial court “prohibited counsel for [Carroll] to participate in the investigation” and “ignored the request of [Carroll’s] trial counsel to inquire of the jury after they rendered the verdict.” Instead, the record demonstrates that the trial court took the lead in investigating the claims and did not prevent Carroll’s counsel from asking for a more in-depth investigation.
*711The relevant section of the record begins after the jury returned a guilty verdict. At that point, the trial court asked counsel, “Do you want a polling?” to which counsel answered, “Can we inquire?” presumably as to any alleged bias resulting from the statements to jurors. In response to counsel’s request, the trial court initiated an inquiry, asking both jurors whether the statements had any impact on them deliberations. The two jurors answered in the negative.2 The judge then asked, “Do you want a polling?” to which counsel answered, “Yes.” The trial court then polled the jury.
It is significant that counsel never asked the trial court to conduct any further investigation or to question the jurors individually in closed chambers. See White v. Smith, 984 F.2d 163, 166 (6th Cir.1993) (observing that counsel did not request a hearing for the purpose of assessing the impact of statements that the jury heard); United States v. Walker, 160 F.3d 1078, 1084 (6th Cir.1998) (same for impact of juror riding in elevator with co-defendant). Carroll is simply incorrect in stating that the trial court prohibited anyone from participating in the investigation or ignored anyone’s requests because counsel did not make any requests.
Second, Carroll’s argument falters because precedent from the United States Supreme Court does not require more than what the trial court did in this circumstance. The two principal cases upon which Carroll relies, Remmer v. United States, 347 U.S. 227, 74 S.Ct. 450, 98 L.Ed. 654 (1954), and Smith v. Phillips, 455 U.S. 209, 102 S.Ct. 940, 71 L.Ed.2d 78 (1981), do not support his argument that the trial court failed in its obligations.
In Remmer, an unknown person tried to induce the jury to find the defendant not guilty by attempting to bribe a juror. 347 U.S. at 228, 74 S.Ct. 450. After the juror informed the court of the bribe offer, the FBI interviewed jurors. Neither the judge nor the prosecutor, however, informed the defendant of the incident. Id. On appeal following a conviction, the United States Supreme Court ordered the district court to conduct a hearing to determine whether the incident harmed the defendant, and, if so, to hold a new trial. Id. at 230, 74 S.Ct. 450; see also United States v. Herndon, 156 F.3d 629, 637 (6th Cir.1998) (holding that to fulfill its Rem-mer obligations, a trial court must investigate claims of juror misconduct and not just permit defense counsel to make a record for the purposes of appeal). This case stands in stark contrast with Rem-mer since the state trial court did, in fact, engage in an investigation of allegations of bias during which the jurors said that they could serve in a fair and impartial manner. See Zuern v. Tate, 336 F.3d 478, 486 (6th Cir.2003).
Smith, similarly, does not support Carroll’s position. In Smith, a juror in a state murder trial applied for a “major felony investigator” position at the district attorney’s office. 455 U.S. at 212, 102 S.Ct. 940. After the jury convicted the defendant, the state trial court held a hearing during which the juror “explained that he had seen nothing improper in submitting the application during the trial.” Id. at 212-13, 102 S.Ct. 940. After hearing this *712evidence, the state trial court held that there was no prejudice against the defendant on the part of the juror, 455 U.S. at 213, 102 S.Ct. 940, and the United States Supreme Court refused to disturb the state court’s finding. Id. at 218, 102 S.Ct. 940. As in Smith, the trial judge in this case investigated allegations of bias, and, as in Smith, Carroll offers no justifications (beyond calling the state proceedings “superficial and wholly inadequate”) for overturning the findings of the state courts. Id.3
Thus, while the trial court might have done more to investigate the claims of jury tampering,'there is nothing in Remmer or Smith that required the trial court to do so. For this reason, Carroll’s claim is without merit because the state courts did not engage in an unreasonable application of federal law.
II. Michigan Courts Reasonably Determined That The Trial Court Did Not Deny Carroll The Right To Counsel By Allowing Counsel For Co-Defendant To “Stand In” For Carroll’s Counsel.
The state courts, similarly, did not engage in an unreasonable application of clearly established federal law, as determined by the United States Supreme Court, when they rejected Carroll’s argument that he was denied counsel during jury reinstruction. Clearly, Carroll had a right to counsel when the trial court reinstructed the jury. See Strickland v. Washington, 466 U.S. 668, 686, 104 S.Ct. 2052, 80 L.Ed.2d 674 (1984) (right to counsel); United States v. Cronic, 466 U.S. 648, 659, 104 S.Ct. 2039, 80 L.Ed.2d 657 (1984) (right to counsel at critical stage of trial); French v. Jones, 332 F.3d 430, 436 (6th Cir.2003) (critical stage includes giving of supplemental jury instructions). The only question that remains is whether the Michigan state courts unreasonably applied United States Supreme Court precedent when they determined that Carroll was, in fact, represented by counsel when counsel for co-defendant “stood in” for a portion of the jury reinstructions.4 Because the Michigan courts did not unreasonably apply Supreme Court precedent, we affirm the district court’s denial of habeas relief.
The Michigan Court of Appeals distinguished the facts before it from a case in which counsel for co-defendant did not “stand in” during the jury reinstructions. The court noted that
*713the record reveals that defendant was not denied his right to counsel during the reinstruction. Defense counsel thanked codefendant William Thomp-kin’s attorney for standing in for him during the reinstruction, and Thomp-kin’s attorney objected to the conspiracy instruction on behalf of both defendant and Thompkins. In addition, the trial court acknowledged that Thompkin’s attorney “stood in” for defense counsel during the reinstruction. Therefore, because defendant was represented by counsel during the reinstruction, he was not deprived of his Sixth Amendment right to counsel.
The Michigan court’s solution to the problem of having counsel for co-defendant “stand in” for counsel is not the ideal solution, nor consistent with this court’s precedent regarding what federal courts must do. See Olden v. United States, 224 F.3d 561, 568-69 (6th Cir.2000). The preferred solution to such problems is to generate ex ante approval by having the trial court ask the defendant whose counsel is not present whether he or she consents to having counsel for co-defendant stand in, and insuring that the consent is informed. See United States v. Patterson, 215 F.3d 776, 784-85 (7th Cir.2000).
The Supreme Court, however, has not required this court’s solution in Olden. The cases upon which Carroll relies, Johnson v. Zerbst, 304 U.S. 458, 58 S.Ct. 1019, 82 L.Ed. 1461 (1938), Brewer v. Williams, 430 U.S. 387, 97 S.Ct. 1232, 51 L.Ed.2d 424 (1977), and United States v. Cronic, 466 U.S. 648, 104 S.Ct. 2039, 80 L.Ed.2d 657 (1984), did not reach the issue of co-defendant’s counsel “standing in” during a critical phase of the trial, a common practice in extended multi-defendant trials. See United States v. Jackson, 207 F.3d 910, 918-19 (7th Cir.2000); Patterson, 215 F.3d at 783-86. In Johnson, for example, the Supreme Court dealt with a situation in which defendants were tried, convicted, and sentenced without assistance of counsel. 304 U.S. at 460, 58 S.Ct. 1019. The Court held, “[i]f the accused, however, is not represented by counsel and has not competently and intelligently waived his constitutional right, the Sixth Amendment stands as a jurisdictional bar to a valid conviction and sentence depriving him of his life or liberty.” Id. at 468, 58 S.Ct. 1019. The Court, however, did not discuss whether a “stand in” counsel constituted counsel for the purposes of this test. In Breiver, the Court determined whether a defendant waived the right to counsel when the police intentionally interrogated the defendant after adversary proceedings had commenced, and the Court did not reach the issue of whether a co-counsel briefly “standing in” deprived a defendant of his rights. 430 U.S. at 404-05, 97 S.Ct. 1232. The issue instead was whether defendant waived his right under Massiah v. United States, 377 U.S. 201, 84 S.Ct. 1199, 12 L.Ed.2d 246 (1964), not to be interrogated without a lawyer present, when defendant responded to a “Christian burial” ploy by investigating police. Finally, in Cronic, the Supreme Court held that there was no constitutional violation when an inexperienced attorney represented a defendant, but noted that the court has “uniformly found constitutional error without any showing of prejudice when counsel was either totally absent, or prevented from assisting the accused during a critical stage of the proceedings.” 466 U.S. at 659 n. 25, 104 S.Ct. 2039. The Supreme Court did not address whether “stand in” counsel solves the problem of an absent counsel. Because no United States Supreme Court precedent deals with the issue of “stand in” counsel, the Michigan Courts did not engage in an unreasonable application of Supreme Court precedent when they determined that Carroll was not denied as*714sistance of counsel at the jury reinstruction phase.
For these reasons, we affirm the district court’s denial of Carroll’s habeas petition.
. The Michigan Court of Appeals and the federal district court also rejected Carroll's arguments that the trial court violated Carroll’s right to a fair trial and due process when the jury saw him wearing handcuffs, and that the prosecutor committed misconduct by vouching for the credibility of a witness. The district court did not appear to rule on Carroll's sentencing argument, which Carroll raised before the Michigan courts and (tangentially) before the federal district court. Carroll does not raise the sentencing issue on appeal. On February 7, 2005, the federal district court denied Carroll's Motion for Reconsideration and his Request for a Certificate of Appeala-bility. On October 25, 2005, this court granted Carroll a certificate of appealability as to the two issues that he raises on appeal.
. It is not unusual for judges to take an active role in investigating. See, e.g., United States v. Sturman, 951 F.2d 1466, 1478 (6th Cir. 1991) (judge asked whether an incident would affect jurors’ ability to remain fair and impartial); United States v. Pennell, 737 F.2d 521, 529 (6th Cir.1984) (describing a thorough investigation by the trial court). As to Carroll’s suggestion that it was improper to ask jurors questions in open court, appeals courts afford trial courts discretion to determine the scope of proceedings necessary to determine juror bias. See United States v. Griffith, 17 F.3d 865, 881 (6th Cir.1994).
. Carroll refers to a series of Sixth Circuit decisions to suggest that state courts must engage in a more extensive Remmer review. Our inquiry here, however, focuses on United States Supreme Court precedent and none of these Sixth Circuit cases that Carroll refers to suggest that the Michigan courts’ interpretation of United States Supreme Court precedent was unreasonable. Thus, while this Circuit in direct appeals may require more stringent procedures, United States Supreme Court precedent guides our review of state habeas petitions.
. The parties dispute the appropriate standard of review. The state argues that state trial courts made a factual determination that counsel did, in fact, represent Carroll, and that deference to this factual finding is appropriate. Carroll, on the other hand, argues that deference is not appropriate because the state courts made a legal determination that the facts, as they existed in the record, do not show a violation of Carroll’s constitutional right to counsel. “The question of whether the trial judge deprived [a defendant in a state criminal trial] of his right to counsel during the supplemental jury instruction is a mixed question of law and fact.” French v. Jones, 332 F.3d 430, 435 (6th Cir.2003). The court defers to any factual findings that the state courts made (e.g., that counsel arrived at the end of the proceedings) but overturns state courts' legal conclusions (e.g., that the trial court did not deprive defendant of the right to counsel) only if the state courts unreasonably applied United States Supreme Court precedent.