Which factors increase the likelihood of teen violence?

2 groups: Two groups of violent teens. 1. Come from a family background of abuse, neglect and family violence; have not learned effective skills of communication, problem solving, self and anger management ; has multiple problems in school, home and community; delinquency; past violent behavior. 2 - psychotic, delusional, paranoid, late teen male, event that damages ego, told someone of violent plans.