a kidnapper
a person who abducts someone and holds them captive, typicallu to obtain ransom
a robber
a person who steals
a smuggler
a person who imports or exports secretely contrary to the law
drug dealer
a person who sells illegal drugs
a blackmailer
a person who demands money or another benefit from someone in return for not revealing damaging information about them
an arsonist
a person who deliberately sets fire to a building or vehicle
a burglar
a person who illegally enters a building in order to steal things
looter
a person who steals goods, typically during a war or riot