Karoline Heintz, an 18-year-old incoming freshman on the Pennsylvania Western University soccer team, was allegedly stabbed to death by her boyfriend Royce Moser, whose mother then allegedly helped her son after the attack.

Moser, 18, allegedly said during an interview with investigators that a “demon” took over and instructed him to stab his girlfriend, according to court documents.

Pennsylvania State Police said Heintz met with her boyfriend outside his father’s residence in North Strabane to talk.

“She spoke with him while sitting in her vehicle in his driveway. During the conversation he got angry by something she said to him, but he could…

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