On Monday, May 4, 2015, at about 5:30p.m., San Diego County Sheriff's Department Detective Paul Ward wasreturning to Sheriff's Administrative Offices after conducting aninterview in East County. Detective Ward was on duty at the time. As hewas preceding west bound on I-8, in the area of I-125, he observed avehicle coming up behind him at a high rate of speed. The car swerved tothe left, driving onto the dirt center median, fishtailed, and narrowlymissed colliding with Detective Ward's car.The car continued driving erratically, weaving in and out of traffic,west bound on I-8. Detective Ward did not follow the car, but noticed itup ahead, when traffic slowed. He observed this vehicle take theCollege Avenue exit and he began to follow at that point.The car ultimately stopped and parked in the driveway of a residence inthe 6300 block of Lambda Drive. Detective Ward and the driver of theother car, 25-year-old Robert Branch, exited their respective vehicles.Detective Ward verbally identified himself to Branch as a San DiegoDeputy Sheriff and produced his badge and identification card. Branchwas wearing a black tactical vest with "Security" on the front with anattached gun holster.Detective Ward asked Branch for his license and registration, at whichtime Branch became agitated, uncooperative, and refused to comply withDetective Ward's request. Branch claimed Detective Ward was not on duty.