TRAFFIC STOP
This clip is from one of the Fox Network's "Caught in the Act" programs, and boy, did they. This shows several functions of a police officer being able to use a video camera to advantage. This unfolds like a rather dense, fast moving narrative. When neighbors are possible threats to an arrest, the officer lets them know they're being taped, and enlists their aid. In the real capper, however, the wife's surreptitious removal of drugs from the car is one of those acts hidden cameras seem made for.
While nowhere near as dramatic, we have a section on traffic stops in our Gallery of Hidden Camera Examples.