Random Superheroes Who Have Killed People (29 items)

(#8) John Stewart Accidentally Obliterates A Whole Planet

Cosmic Odyssey #2

Due to his arrogance and overconfidence, Green Lantern John Stewart dooms an entire planet when he can't stop a bomb set to destroy the planet.
(#28) Star Boy Blows Away Kenz Nuhor

Adventure Comics #342

This issue saw Star Boy ending the life of Dream Girl's ex-boyfriend Kenz Nuhor in self defense. Granted, Nuhor was asking for it. The real bummer is that Star Boy violated the Legion's "no slaying" rule and was expelled from the group.
(#12) Superboy Prime Accidentally Decapitates Pantha

Infinite Crisis #4
In the middle of the Teen Titans trying to break up a fight between Superboy and Superboy Prime, Superboy Prime accidentally backhands the Teen Titan Pantha, decapitating her in the process. The blow was so forceful that Pantha's head even knocked out Ambush Bug.
(#18) Thor Zaps Goliath

Civil War #4

In Civil War #4, the heroes of the Marvel Universe are all fighting over the Superhero Registration Act. Goliath was fighting in support of Captain America's anti-Registration team when he came up against a clone of Thor and a grisly demise.
(#14) Wither Accidentally Ends The Life Of His Father

New Mutants, Vol 2 #3
Kevin Ford, the mutant Wither, first manifested his power to decay organic matter on touch as a teenager. In a panic, his father attempted to comfort him, only to be reduced to dust.
(#26) Moon Knight Cuts Off Bushman's Face

Vengeance of the Moon Knight #6

After and long and bloody battle on a rooftop, Moon Knight finally has the advantage on his enemy and decides to use this leverage to slice off his face.