Convict : declare (someone) to be guilty of a criminal offence by the verdict of a jury or the decision of a judge in a court of law. Robber : a person who commits robbery. Thief : a person who steals another person's property, especially by stealth and without using force or threat of violence. Cut-throat : (of a competitive situation or activity) fierce and intense; involving the use of ruthless measures. Bandit : a robber or outlaw belonging to a gang and typically operating in an isolated or lawless area.