When cops in a Rialto, California were forced to wear cameras, their use of force dropped by over two-thirds. Additionally, the officers who were not made to wear the cameras used force twice as much as those who did. This strongly suggests the majority of the time police use force is unnecessary. In other words, the majority of the time these officers used force they were simply committing acts of violence which they don’t feel comfortable committing if it’s captured on film.
From The New York Times:
HERE’S a fraught encounter: one police officer, one civilian and anger felt by one or both. Afterward, it may be hard to sort out who did what to whom.