I have two theories: 1) He was murdered. 2)He was efeminate and hated that about himself. Both theories are plausible, knowing statisticaly 90% of the time a female suicide death occurs when a gun is fired through the heart. A man 90% of the time shoots himself in the head. Just an observation. The only other theory would be that he wanted to see himself conciously die, which is more creepy than any of us should like to entertain. He had a history of troubles with family. Fame can do some strange things to people, and his ending was horrific. I’d still be questioning that girlfriend intensely to see if there are any holes in her story-—sounds very fishy.
Uh... in developing your truly crackpot theories you forgot to notice another NFL player recently killed himself with a shot to the chest specifically to preserve his brain for study.