Police allege that 18-year-old Royce Moser fatally stabbed his girlfriend, Karoline Heintz, during an argument in her vehicle in Washington County, Pennsylvania, on 19 August. His mother, Rachel Moser, is accused of helping him clean the vehicle and leave it at a library car park with Heintz’s body inside, rather than contacting authorities; both deny no facts in the supplied extract, and the allegations remain to be tested in court.

Heintz, also 18, was due to begin at Pennsylvania Western University and play Division II football. Investigators say Moser used a large kitchen knife after telling Heintz he was retrieving something from his father’s house, then drove roughly 30 minutes to his mother’s home; court documents reportedly say the pair later travelled in separate cars wearing blue latex gloves and used disinfectant on the Jeep.