​Teen Accused Of Killing Girlfriend Hike: Boyfriend Hike Turns Crazy After Break-Up​​

May 28, 2021

A teen is accused of killing his girlfriend along a suburban Philadelphia hiking trail after stabbing her in the throat and body.

Pennsylvania State Police say Julianne Siller, 17, was killed Saturday night by her 16-year-old boyfriend Tristan Stahley during a break-up.

The teens left the Stahley’s Skippack Township, Pa. home around 8:30 p.m. and headed for Palmer Park along Creamery Road in Skippack Township, Montgomery County, Pa. Skippack is about 30 miles northwest of Philadelphia.

Investigators say the couple was walking along a nearby trail when they got into an argument over Siller “going out too much.” Siller then smashed Stahley’s cell phone, according to state police. Then Stahley allegedly pulled out an orange-colored folding knife and stabbed his girlfriend in the throat and body.

Stahley told police he then dragged her body off the trail and into the woods to conceal the murder.

Police say the teen then went home. His mother, Heather Stahley, told investigators it appeared Tristan had been crying and that he had blood and dirt on his legs.

When Heather asked her son what was wrong, he wouldn’t explain, saying he would tell her if the two went for a walk.

Police say the two then left the house for a nearby trail and during the walk Tristan confessed to the crime. Heather asked her son if he was joking and after he replied “no” he began hysterically crying, according to the criminal complaint.

The teen explained the couple was breaking up when he stabbed Siller. Tristan told his mother he was going to kill himself because he couldn’t go to jail.

The mother and son then returned home at 9 p.m. where Heather alerted the authorities.

In the meantime, Tristan waited outside.

His father, Brian Stahley, told police when he went outside, Tristan had another knife to his neck and told him to stay back.

The father and son then got into a struggle as Brian tried to wrestle the knife away. He was eventually able to get the knife, but was scratched in the face and bitten on the hand, according to police.

Minutes later, police arrived and arrested the teen.

Troopers discovered Siller’s dead body in the woods a short time later.