Funny how the guy took steroids for years and never killed anyone, then he suddenly changes religion and bam! - maybe coming to terms with the religion fucks with his head (i'm not saying anything about islam or any other religion here) - who knows, but it sure as hell hasn't got anything to do with high doses of naturally occuring hormones in his body.
The guy's clearly a few slices short of a loaf - I mean, he's got a shotgun in his hand and yet he leaves the shop because "he can't open the cash register".
If he was a bodybuilder he shoulda been able to carry the cash register. BUT If I ever kill anyone I'm going to blame it on music...because that is really starting to go out of style and needs to be brought back.