Three friends of Boston bomb suspect face federal charges . Lawyers say their clients have cooperated with investigators . The men are accused in the bombings that killed three people and injured more than 260 others on April 15 at the finish line of the marathon. `` Kadyrbayev knew when he saw the empty fireworks that Tsarnaev was involved in the marathon bombing , '' the affidavit states . Tsarnaev texted friends , `` Come to my room and take whatever you want ''
Three friends of Boston bomb suspect face federal charges . Lawyers say their clients have cooperated with investigators . The men are accused in the bombings that killed three people and injured more than 260 others on April 15 at the finish line of the marathon. Tsarnaev texted friends , `` Come to my room and take whatever you want ''