Siebog
Anti-heroes will kill one to save many. Killing innocents for no other reason than testing someone else's resolve is not the action of an anti-hero but a cold blooded psychopath, even some villains have higher standards. A goody two shoes mc wouldn't have killed the criminal, an anti-hero would either do that or beat him to near death at the very least. The mc is not an anti-hero but a psycho.