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. Subscribe to WCVB on YouTube now for more: http://bit.ly/1e8lAMZ Get more Boston news: http://www.wcvb.com Like us: https://www.facebook.com/wcvb5 Follow us: https://twitter.com/WCVB Instagram: https://www.instagram.com/wcvb5/