William Wright North, 47, was last seen April 22, 1999, in Duncan Mills, California. He had planned to go to the beach for Earth Day and was observed hitchhiking in the area. On April 23 his gray backpack was found abandoned in the north parking lot of Goat Rock Beach in Jenner; searchers found no sign of him there.

At the time of his disappearance North was reported to be struggling with depression, a detail investigators say may be relevant. He was dressed in a multi-colored Hawaiian shirt, Levi’s jeans and black shoes when he went missing. He is 5 feet 11 inches, about 160 pounds, with brown hair and blue eyes.

North has not been seen or heard from since April 22, 1999, and the Sonoma County Sheriff’s Office continues to investigate. If anyone has information about his movements that day or what happened after he was seen hitchhiking, please contact the Sheriff’s Office.