Behind bars in Atlanta for bank robbery in the 1950s, Whitey Bulger became depressed and pondered thoughts of suicide.The infamous crime boss began seeing things that weren’t there and hearing voices when no one was around. He thought he saw blood coming out of walls and humans transform into skeletons. For someone with an obsessive need to control and intimidate, Bulger thought he was going insane.Also Read: The CIA once hired prostitutes to te…