In what circumstances will a police officer stop a car for running a stop sign?

Similarly, in Williams v. Superior Court (1985) 168 Cal.App.3d 349, 213 Cal.Rptr. 919, a police officer followed a car in the hope of linking its occupants to a reported burglary. When the car ran a stop sign, he pulled it over. He asked the driver for his license and registration, then separated the driver and the occupant and talked to each of them about where they lived and what they were doing in the neighborhood. Finally, he asked the driver if he could search the car. The driver agreed. The search produced cocaine. (168 Cal.App.3d at pp. 354-356, 213 Cal.Rptr. 919.)