Talk:Mr Orange/@comment-24.99.56.211-20160525041542

If he'd survived the heist, Mr. Orange would have had to answer for the murder of an innocent bystander. The shot was instinctive, but you could see it affected him deeply, even more than the pain of having just been shot.

So I think in part Mr. Orange had something of a deathwish. Plus his own feelings of having betrayed Mr. White, as others have pointed out. Keep in mind that this is a married man, a cop who'd already been struggling with his identity (src: taking off and hiding his wedding ring before meeint Joe, his own boss's admonishment not to identify with the crook who'd vouched for him).

So whether he constructs himself as a cop or a criminal, he's got some major guilt weighing on him. Plus the pain. Plus (having been shot again), the sense that he might be dying already.