Dave Oberhoffer started a law-enforcement career in 1979, having survived the Vietnam War, and owning an Irish Pub. His San Francisco Police Department assignments were: Walking a foot-beat, numerous sector car assignments, and Vice and Narcotics work. As an Inspector, he was then assigned to the Special Investigations Division for five years. This was followed by work as a Squad Sergeant running a team in the housing projects on Potrero Hill. As a Lieutenant, he ran the Records Division, the Crime Scene Investigation Unit (CSI), and was a Watch Commander in four different districts, retiring at the San Francisco Airport.  After retirement, Dave had a cup-of-coffee as a small-town Chief of Police, and then taught Law Enforcement Studies at several Bay Area Colleges.