juvenile delinquent

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A juvenile guilty of antisocial or criminal behavior.

from the GNU version of the Collaborative International Dictionary of English.

• noun A child or person of minor age who commits acts which would be considered criminal if performed by an adult, such as theft, vandalism, or violence; especially, one who habitually acts in such an antisocial manner and cannot be controlled by parents. Abbreviated JD.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun law A persistent young offender; an antisocial minor, one who has committed criminal acts such as theft or violence.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a young offender