William David Shannon, 47, of Salem, Oregon, was last seen September 4, 1995, in Skykomish, Washington, after driving to a National Forest trailhead for Lake Angeline. His 1991 blue Pontiac 2+2 was found abandoned at the trailhead, but Shannon had left behind prescribed medication he needed for mental and medical conditions.

At the time he disappeared he was described as a white male, 6 feet 4 inches tall, about 180 pounds, with brown hair and blue eyes. He was believed to be wearing a t-shirt, long pants, and a baseball or golf-style cap, possibly light-colored wire-frame glasses, and carrying a blue Jansport backpack. The King County Sheriff’s Office launched search and rescue operations around the lake and surrounding rugged terrain, but the exhaustive search produced no trace.

The investigation remains open and the circumstances of his disappearance are unresolved. If anyone has information about William Shannon’s movements near Lake Angeline or saw him on or after September 4, 1995, please come forward.