Hit-man

Contract killing, sometimes known as murder-for-hire, is a form of murder or assassination in which one party employs another party to extrajudicially kill a targeted person or people via an illegal agreement that involves some form of compensation, monetary or otherwise. An act of contract killing is also known colloquially as a hit, and the person performing the killing (i.e. the contract killer or "contractor") is known as the hitman or (as borrowed from Spanish) "sicario".