Prosecutors said the teenager lied in wait in an apparent ambush designed to shoot and kill her stepfather after killing her mother.

An "evil" 15-year-old Mississippi teenager will spend life in prison without the possibility of parole after fatally shooting her mother in the face and attempting to kill her stepdad. Carly Gregg of Brandon sobbed in court on Friday as she learned her fate.

The first day of Carly Gregg’s trial began Monday, with opening statements and an emotional 9-1-1 call being played for the jury. The Rankin County teen is accused of killing her mother, a teacher at Northwest Rankin High School,

On the day of the shooting, Clark said Gregg was “grumpy and irritable” and couldn’t focus in class at Northwest Rankin High School, where her mother, Ashley Smylie, was a math teacher, according to The Clarion-Ledger. Clark said the teenager claimed her memory “went blank” that day after she let out her dog in the backyard.

Carly Gregg was 14 when she fatally shot her mother and attempted to kill her stepfather inside the family's Brandon, Miss., home

Carly Gregg was sentenced to life in prison Friday for fatally shooting her mother and attempting to murder her stepfather. Gregg, who was 14 at the time of the offenses, was also sentenced to serve 10 years in prison for tampering with evidence.