Another Kit Hammer special, "Motor Patrol" from 1950 concerns the motorcycle police of the traffic division at the LAPD.
Ken Foster, an officer in training, is engaged to Jean, who is the sister of a motorcycle cop, Larry Collins.
Larry is investigating a hit-and-run that seems deliberate. When he sees a stolen car that was used in the crime, the driver kills him.
Ken then impersonates an auto thief who is now in police custody and is accepted into the city's stolen car ring. The problem is, one of the people involved is suspicious of him.
I recognized one of the actors from television but that's about it, though the acting was okay. It was another low-budget black and white film about law enforcement.
Not much else to say about it - a couple of big car/motorcycle chases.