A Real Prodigy

Some people just don't get it. Chelsea is a big bully at her high school, and she gets caught cheating by her teacher, Breanna, She gets detention and fails the class. Instead of taking her punishment she searches for the teacher to get even for the punishment. She underestimates the teacher, because of her size, and get her butt kicked in a private fight in the gym after school. Still feeling like she was unfairly treated by the teacher she shows up at Breanna's home, and starts out by assaulting her husband Bill, before Breanna can come to his aid, Chelsea has used a taser on both Bill and Breanna.
Things get crazy and eventually someone gets mortally wounded, one person dies and Chelsea seem to be totally in charge of the situation with the aid of her weapon. Chelsea stays at Breanna's home overnight intent on inflicting as much humiliation as possible on the couple. The bully is out of control and eventually she is responsible for Breanna's husband death. She thinks she can hole up at Breanna and ride the storm out but doesn't take into account by not going home after her brutal time with Breanna, her parents would be looking for her.
They send the police out scouring the neighborhood looking for their missing daughter. Now trapped in Breanna's house holding the teacher hostage with the police on the way. As a last resort she threatens to kill Breanna if she tells the police what happened. Will the police see through Chelsea's evil doings?