Actually, that makes Fowler seem a little bloodthirsty, doesn't it? And there are moments when he's in the middle of a fire fight with villains in which he does revel in the idea that the men he's mowing down are getting their just desserts. But he does take them alive when he can and he does follow the rule of law.
Kind of like Cagney in the movie G-Men. Gee whiz, now I gotta watch that again.