A Pennsylvania college soccer player was fatally stabbed by her boyfriend, who then enlisted his mother to help dispose of her body, according to authorities. Karoline Heintz, an incoming freshman on the women's soccer team at Pennsylvania Western University, was discovered deceased in the rear of her Jeep Cherokee on Thursday, August 21, 2026, near the university's campus in California, Pennsylvania.
Heintz had met with her boyfriend, Royce Mosher, after attending a family gathering. The two began discussing their relationship in Heintz's vehicle at Mosher's father's residence. According to Pennsylvania State Trooper Rocco Gagliardi, the conversation deteriorated, leading Mosher to retrieve a large knife from inside the home. He allegedly returned to the car and stabbed Heintz in the chest, causing her to fall out.
Mosher then placed Heintz in the rear hatch of her Jeep and drove to his mother Rachel Mosher's home in Beallsville, Pennsylvania. Authorities state that Rachel Mosher assisted in attempting to clean the vehicle and her son's clothing of bloodstains before accompanying them in a separate vehicle to California Borough, where they abandoned the Jeep with Heintz's body inside.
Heintz's family contacted police for a wellness check when she failed to return to her dorm room as expected. Officers located her body in the abandoned vehicle, which showed signs of bloodstains, outside the California Borough Library. Both Royce Mosher and Rachel Mosher were arrested on Thursday morning.
Royce Mosher reportedly told his mother that he felt “demons” had taken over and instructed him to stab Heintz. Officials have not yet revealed a confirmed motive for the attack, nor have they stated whether the suspect's mental health history was a factor.
"It is more of an unfortunate event, 18-year-old girl, young soccer star ready to explore life, ready to start college, now can no longer get to do that," Gagliardi stated.
Royce Mosher faces charges including criminal homicide, two counts of tampering with evidence, two counts of abuse of a corpse, and obstruction. His mother, Rachel Mosher, is charged with tampering, obstruction, hindering apprehension of a fugitive, and abuse of a corpse. She offered an apology to Heintz's family, stating, "I'm sorry... That my son took a life."
Heintz had graduated from Peters Township High School in June and was preparing to begin her collegiate soccer career at PennWest University, with the team's first game scheduled for August 29. The university released a statement expressing deep sadness over Heintz's death and extending condolences to her family and friends.