Destoni says when she gets mad, her anger takes over and although she only intends to argue with people, she finds herself punching, hitting and knocking her head into things. The 14-year-old admits that she’s made up rumors about teachers in school and that she’s threatened to shoot other children.

TELL DR. PHIL YOUR STORY: Problems with your teen?

Destoni also admits that she has “chased” her sister and her sister’s babysitter with a butcher knife, because they were “kind of annoying” her.

“What goes through your mind at the time that gives you permission to say, ‘I’m going to take a butcher knife out of the kitchen, and chase somebody and threaten their life with it’?” Dr. Phil asks the teen on Monday’s episode.

“I was mad,” she replies.

WATCH: Mom Says Teen Is Violent, Acts Out, Tells Her To 'Shut The Hell Up'

“So, when you’re mad, you get to do what you want to do?” Dr. Phil asks.

Hear Destoni’s response and how she justifies her behavior in the video above.

On Monday’s episode, hear about some of Destoni’s behavior at school. And, Dr. Phil drills down to determine what’s driving the teen. Then, on Tuesday, Destoni comes face to face with a group of her peers. Plus, see what happens when Dr. Phil offers her help. Check here to see where you can watch.

TELL DR. PHIL YOUR STORY: The final straw! I Need Dr. Phil to step in!

Teen Accused Of Threatening To Shoot Students Says She Told A Boy, 'He's Lucky He Doesn't Have A Bullet Through His Head'