A teenager who was native to Southern California died after being stabbed to death by her boyfriend in Illinois, her father tells KTLA 5 News. Jon Prince reached out to KTLA on Tuesday morning, saying that his daughter, 17-year-old Cadence Prince, was stabbed multiple times by her boyfriend on Sunday night in O’Fallon, Illinois, which is located 18 miles east of downtown St. Louis, Missouri, in southwestern Illinois. ... According to Jon, detectives with the O’Fallon Police Department told him that after the stabbing, the boyfriend called his grandparents — who are said to be his legal guardians — and...