A transgender teenager from Pennsylvania has pleaded guilty to killing a 12-year-old while they were watching Netflix together and then showing the child’s body on Instagram.

Ash Cooper, 18, who was born Joshua Cooper, pleaded guilty on Thursday to charges including third-degree murder, possession of an instrument of crime and tampering with or fabricating physical evidence in the death of Morgan Connors, Fox News reports.

The two were watching Netflix on Nov. 25, 2022 at a trailer park in Bensalem Township when Connors got up to use the bathroom and Cooper took her father’s gun from his safe, according to court documents obtained by the Bucks County Courier Times.

Police would later receive a call from the mother of one of Cooper’s acquaintances, who said she saw Connor’s body in a video call on Instagram.

Cooper was sentenced Thursday to 15 to 40 years behind bars.

As a legal adult, she is also required to undergo a psychological and psychiatric evaluation.