SOUTH STRABANE TOWNSHIP, Pa. – (WPXI) – Pennsylvania State Police are continuing to investigating the homicide of a Washington County teenager from 1977. Brenda Ritter, 17, from South Strabane Township, left her boyfriend’s house on May 18, 1977 in a bad storm. Her car was found abandoned a few miles away the next day. Searchers in a state police helicopter found Ritter’s nearly nude remains on a hillside off rural Roupe Road, about three-quarters of a mile from her car, state police said. Her clothes were found within around 50 feet of her body. State police said Ritter had been sexually assaulted and strangled. Any persons with information regarding this incident are asked to contact the PSP Washington Station at 724-223-5200 or you can contact PSP Tips. All callers could be eligible for a cash reward.