This clip shows police activity in the Mission District of San Francisco during a night in ’79 - specifically, at 23rd and Mission Streets. 

A policeman and two civilians look at documents on the hood of a car. Another  policeman leans into the passenger side of a lowrider car.

Three guys in white t-shirts sit in a lowrider as a policeman uses a flashlight to look at identification; someone in civilian clothing, possibly a reporter, looks on and jots things down on paper; cars and buses pass by in the background.

Four policemen gather on the driver’s side of a lowrider; a man, with his back to the camera, talks to the people inside the car. Another policeman writes a citation for someone in the foreground.

A couple of white policemen frisk a handcuffed Latino man as a photographer takes a shot.

A MS of a policeman pulls back to show him using a flashlight to allow four low riders to make a left turn.

Three civilians stand on the curb and watch as two policemen oversee a street intersection and direct a lowrider to turn left.