Former New England Patriots star tight end Aaron Hernandez killed himself overnight in his prison cell, the Massachusetts Department of Corrections said Wednesday morning. Hernandez hanged himself with a bedsheet and tried to block his single-occupancy cell’s door, officials said; he was found at about 3 a.m. and pronounced dead at the hospital. The former NFL star was serving a life sentence at the Souza Baranowski Correctional Center in Shirley, Massachusetts, after being convicted of a 2013 murder. Last Friday, he was acquitted of double first-degree murders prosecutors say he committed while drunk in 2012. “The Massachusetts State Police are on scene and the investigation continues,” the state Department of Corrections said in a statement. “Mr. Hernandez’s next of kin have been notified.”