X-Cutioner

Carl Denti was a field agent for the FBI whose partner, Fred Duncan, was a member of Professor Charles Xavier's underground. Duncan would cache the technological equipment that the X-Men confiscated from alien races.

After Duncan's apparent death (the circumstances of which have not been revealed), Denti inherited his caseload, and discovered that Duncan was involved with the mutant underground. Seeing the damage mutants have done without punishment, Denti took possession of some of the confiscated weapons and equipment. Calling himself the X-Cutioner, Denti began a vigilante campaign to punish mutants who had not been legally convicted for their crimes. During his assassination of the mutant criminal Tower, the X-Cutioner first encountered the X-Men and used his teleportation device to escape.