State habeas determination that a judge's statement claiming that the jury was zealously watched was more credible than five juror affidavits asserting the jurors slept during the trial was not an unreasonable determination of the facts.
https://www.ca10.uscourts.gov/opinions/17/17-6149.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.