A person who commits an offense against the law, a lawbreaker.
One who gives or causes offense, or does something wrong.
one who commits crimes (especially fraud, bribery, loansharking, extortion etc.) to aid in running a shady or illegal business.
one who instigates or has involvement with a racket.
to commit crimes systematically as part of a criminal organization.
to carry out illegal business activities or criminal schemes.