An adult male suspect approached an off-duty San Francisco police officer, and threatened to batter him several times, on the platform at the San Francisco Airport Station. The victim used pepper spray to subdue the suspect. It was determined the suspect was in need of a psychological evaluation. The suspect, who was issued a Prohibition Order, was transported to a local hospital. He was later booked the Redwood City Jail for assault on a peace officer, resisting arrest and criminal threats.