I'll sleep better tonight knowing that is the case. Shooting him dead will serve as a "lesson" to other animals following his path.
I'm betting that's true; this guy is already dead. My concern is that he knows it. He truly has nothing to lose now; I fear for anyone unlucky enough to encounter him today.
And the cops will find him. Under stress, people like this need a place they feel "comfortable" or familiar. He'll head there. Such a place will be known to those who know this guy, and the cops will find those people and question them. Their questioning techniques of those who know him will not be gentle.