History
Mr. Taylor, along with his family, was kidnapped by Weapon-X and taken to the Neverland concentration camp. In Neverland, mutants deemed useful (like the Taylors) were branded with a green M on their hands, whilst those deemed less useful were branded with a red M and executed.
This drove him to confront the guards about the executions at which point he was dragged away never to be seen again.
Powers
Mr. Taylor can fire yellow blasts of energy from his hands.