The Collaborative International Dictionary of English v.0.48:
Mutilator \Mu"ti*la"tor\, n. [Cf. F. mutilateur.] One who mutilates. [1913 Webster]WordNet (r) 3.0 (2006):
mutilator n 1: a person who mutilates or destroys or disfigures or cripples [syn: mutilator, maimer, mangler]