Complaints would drop in part because cops would mind their P’s & Q’s, but ALSO because people would stop making false complaints of police misbehavior when they get a traffic ticket.
Fort Worth Implemented this due to accusations. Texas had two DPS officers fired with charges placed against one when they conducted a search for drugs with no justification, which included a female trooper putting her hands inside the women’s pants. Nothing would have happened without the video.
Bingo! A lot of cops want these cameras. False accusations against police are commonplace.