College soccer player allegedly killed by boyfriend who blamed 'demon;' his mom accused of cover-up

Karoline Heintz, an 18-year-old incoming freshman on the Pennsylvania Western University — California 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.