David Tate was 21 and living in San Francisco when he was last seen on July 11, 2011. His disappearance is an unsolved missing person case handled by the San Francisco Police Department’s Cold Case Unit, which reviews long-standing disappearances and homicides.

The SFPD has used outreach, Crime Stoppers, NamUs and its Cold Case and Crime Scene Investigation units to seek new leads, including leveraging DNA and other forensic tools. Despite those efforts and public appeals, David’s whereabouts remain unknown and the investigation is still open.

If anyone had contact with David around July 2011 or remembers seeing him in San Francisco at that time, please contact the SFPD tip line with any information.