Was 'Diff'rent Strokes' Star Gary Coleman Murdered?

A new documentary is questioning if "Diff'rent Strokes" star Gary Coleman was murdered. Coleman was once the highest paid child actor, starring in on the beloved TV series "Diff'rent Strokes." However, he came to resent the character and his iconic catchprase. In 2010, his ex-wife called 911 saying the actor had fallen down the stairs. His ex-wife had doctors take him off life support two days later. Friends still question the circumstances around his death.