Overview

• Geas, already serving a life sentence, pleaded guilty to voluntary manslaughter and assault.
• Bulger, a former FBI informant, was killed hours after arriving at the Hazelton penitentiary.
• Two other inmates received sentences for their roles in the attack, one as a lookout and another for lying to the FBI.
• The Justice Department's inspector general found multiple management failures and flawed policies contributed to Bulger's death.
• Recent legislation aims to increase transparency and oversight in the federal prison system.