"Dillon was a criminal who underwent illegal genetic experiments carried out by Dr. John Skrtic on behalf of industrialist Justin Hammer, who was competing with Osborn Industries to win a lucrative government contract to create a super-soldier serum. Having been successfully given electrical abilities, Electro, as he now liked to be called, was sold into the service of the Kingpin of Crime, Wilson Fisk, in return for construction contracts for another of Hammer’s projects. Electro served Fisk willingly as an enforcer, and when Spider-Man broke into Fisk Tower, the Kingpin set his new acquisition the task of taking the intruder down, something Electro swiftly managed. Electro was subsequently present when Kingpin murdered Frederick Foswell, the underboss known as Mr. Big, for having supplied Spider-Man with information."