The Collaborative International Dictionary of English v.0.48:

law-breaking \law-breaking\ n.
   1. an act punishable by law; usually considered an evil act.

   Syn: crime.
        [WordNet 1.5] lawbreaker

The Collaborative International Dictionary of English v.0.48:

lawbreaker \law"break`er\, law-breaker \law"-break`er\, n.
   One who disobeys the law; someone who violates the law; a
   criminal.

   Syn: violator, lawbreaker, law breaker, perpetrator.
        [1913 Webster + WordNet 1.5] -- Law"break`ing, n. & a.
        [1913 Webster]

WordNet (r) 3.0 (2006):

law-breaking
    n 1: (criminal law) an act punishable by law; usually considered
         an evil act; "a long record of crimes" [syn: crime,
         offense, criminal offense, criminal offence,
         offence, law-breaking]