Who was Aaron Hernandez? Brief timeline shows violent past of NFL star

Early Wednesday, ex-NFL player Aaron Hernandez, who was serving life in prison for a murder conviction and was acquitted of a double murder days ago, was found dead in his prison cell after hanging himself.

Before being sentenced to a life behind bars for murder, Hernandez was once a promising NFL star, with a Super Bowl appearance under his belt and a spot on the New England Patriots as the team's star tight end.

But the NFL star was also living troubled life, with warning signs dating back to college, years before he would be convicted of murder.

See the violent timeline of the NFL player's troubled past.