https://www.mercurynews.com/2021/05/16/police-pr-video-machine-criticized/

The videos showing what police euphemistically call “officer-involved shootings” follow the same formula: a 3-D map of the scene, 911 dispatch tapes and text set up a narrative before viewers see selected body cam footage.

In most cases, a police chief or sheriff opens the video explaining why the shooting was justified. Often, the chief is reading from a script written by an outside consultant. The edited camera footage may not even show the actual use of force – an effect far different from a raw cellphone or body cam video of a confrontation that leaves watchers wondering, “Why did they have to shoot?”