The widow of Boston Marathon bombing suspect Tamerlan Tsarnaev has hired a prominent criminal lawyer with experience defending terrorism cases as she continues to face questions from federal authorities.

Katherine Russell added New York lawyer Joshua Dratel to her legal team, her attorney Amato DeLuca said Wednesday. Dratel has represented a number of terrorism suspects in federal courts and military commissions, including Guantanamo Bay, Cuba, detainee David Hicks, who attended an al-Qaida-linked training camp in Afghanistan.