Summary based on the NamUs case record (MP100302)
On December 1, 1999, 40-year-old William Cothburn O'Brien was last seen in San Diego, California. Standing at 5 feet 4 inches tall and weighing approximately 150 pounds, O'Brien had brown hair and hazel eyes. The circumstances surrounding his disappearance remain unclear, with limited details available.
At the time of his disappearance, O'Brien was reported missing to the San Diego Police Department.
The case was assigned to Detective Anna Glazewski of the Missing Persons Unit. Despite investigative efforts, no significant leads have emerged, and O'Brien's whereabouts remain unknown.
Over the years, O'Brien's case has garnered attention from online communities and forums dedicated to missing persons. Discussions have highlighted the lack of information and the mysterious nature of his disappearance. As of now, no new developments have been reported, and the case remains unsolved.
The San Diego Police Department continues to seek information regarding O'Brien's disappearance. Anyone with relevant information is encouraged to contact the department at 619-531-2000. The passage of time has not diminished the hope that new information may come to light, providing answers to O'Brien's family and friends. Last Seen: Dec 1, 1999
