Julieanne Siller, a 17-year old high school student scheduled to attend Penn State Altoona in the fall was stabbed and murdered by her boyfriend, 16-year old Tristan Stahley, over the weekend according to a CBS Philly Report.

The incident allegedly occurred in Palmer Park Saturday night following an argument at Stahley’s house on Rittenhouse Lane in Skippack Township, located in Montgomery County, Pa outside of Philadelphia.

Per the CBS Report, authorities say the couple continued fighting in the park. Stahley stabbed Siller in the throat and kept stabbing her before dragging her body into a wooden area.

Upon returning home, police were called around 10 p.m. when Stahley and his father got into an altercation. Stahley was quickly arrested, and investigators found Siller’s body in the park shortly after.

Stahley was charged with first-degree murder on Sunday and sent to Montgomery County prison with no bail.

Many of Siller’s friends had good things to say about the girl who was three weeks away from graduating from Spring Ford High School in Royersford, Pa. Additionally, some of her friends tried to warn her in the past about Stahley, sensing that he could cause trouble.

Our thoughts are with Julieanne’s family and friends during this difficult time.