ROCKVILLE, Md. (AP) — A former police officer working to solve a cold case from 1975 says he hopes new appeals on social media may lead to a break in the case.

On a July night nearly 40 years ago, 15-year-old Kathy Beatty left her home in Aspen Hill, Maryland, for a party. She was later found seriously wounded in a wooded area near her home. Police say she’d been sexually assaulted and her skull crushed. She died days later.