Origin
Overkill was the leader of a band of mutants whom had their own televised adventure series in witch their missions where broadcasted.
Creatio
Overkill was created by Mike Allred and Peter Milligan and first appeared in X-Statix Issue 1 (2002).
Major Story Arcs
O-Force Versus The Mysterious Fanboy
Overkill seemed to be the reasonable and always trustworthy leader, but during one mission against a mutant named “the Mysterious Fan-boy”, he ran away from a horde of Zombies, leaving his team-member Ocean to die. Luckily, Ocean was saved by X-Statix, the counterpart team to the O-Force. After the debacle of the mission, O-force was disbanded and nothing has been heard from Overkill since.