Appeals Court Orders Judge to Probe Claims of Juror Bias in Boston Marathon Bomber’s Case

BOSTON—A federal appeals court on Thursday ordered the judge who oversaw Boston Marathon bomber Dzhokhar Tsarnaev’s trial to investigate the defense’s claims of juror bias and determine whether his death sentence should stand. A three-judge panel of the Boston-based 1st U.S. Circuit Court of Appeals did not throw out Mr. Tsarnaev’s death sentence. Defense lawyers had pushed for that while claiming bias by two people who sat on the jury that convicted him for his role in the bombing that killed three people and injured hundreds near the marathon’s finish line in 2013. But the appeals court found that the trial judge did not adequately probe Mr. Tsarnaev’s allegations, and sent the case back to the judge for a new investigation. If the judge finds that either juror should have been disqualified, he should vacate Mr. Tsarnaev’s sentence and hold a new penalty-phase trial to determine whether Mr. Tsarnaev should be sentenced to death, the appeals court said....