New clues on Aaron Hernandez death from inside his prison cell, sources say

BOSTON (CBS/AP) -- Aaron Hernandez’s death in prison overnight Wednesday - just days after the former NFL star was cleared of additional murder charges - remains shrouded in mystery.Why now? Is there more to the story? What happens to his estate?Authorities offered few answers after Hernandez was found hanging from a bedsheet Wednesday in his cell in a maximum-security prison in Massachusetts, where he was serving a life sentence for the 2013 slaying of a onetime friend.His death came hour