Lavena says her 17-year-old son, Trevor’s, anger is out of control, and despite seeing mental health professionals for years, his behavior is growing more aggressive and defiant. She says Trevor screams, curses and breaks things during his rages and has even threatened to shoot people -- and never shows remorse for his actions. She says she fears he could snap and kill her, her husband, her 5-year-old twins -- or become the next school gunman. Lavena says in the last two years she has called the police to intervene four times and is desperate to get help for her son before he turns 18. Hear from Trevor’s psychologist and therapist. What do they say are their biggest concerns? Then, Dr. Phil meets the teen one on one backstage. What does he believe is causing Trevor's behavior? Then, Karen says she’s at her wits’ end with her 15-year-old daughter, Nicole, who she says sneaks out of the house, uses drugs, is promiscuous and recently stole her car. Is this just a rebellious teen, or is th