Patricia Patty Meehan, 37, vanished after a head-on collision on the evening of April 20, 1989, on Highway 200 near Circle, Montana. Witnesses said Meehan appeared disoriented at the scene, climbed a fence, watched from a distance, then walked into a field and disappeared. A trail of footprints investigators believed belonged to her was followed for about three-quarters of a mile before ending.

Meehan lived in Bozeman, roughly 380 miles from the crash site. In the days before the collision she had been described as emotionally distressed and had an appointment with a psychologist scheduled for the day after the accident; she had also talked about moving back to Pennsylvania to be with her parents. Her disappearance prompted a large search and more than 5,000 tips, including reported sightings at truck stops, diners and restaurants across the Midwest and Pacific Northwest that police considered in some cases credible, but none led to her being found. Authorities have considered possible amnesia from head trauma as an explanation.

If anyone knew Patty Meehan or has information about her movements in April 1989, please share what is known.