The myth of body cams

This Slate piece by two criminology professors who have studied the issues. They doubt cameras will prevent another Ferguson shooting, which is almost certainly true. But they also found (from studies of police in Mesa, AZ) found changes in police behavior--officers with cameras conducted fewer stop-and-frisks and arrests, although they wrote more citations. They also initiated more contacts with citizens, perhaps after observing behavior for longer to ensure themselves they were seeing wrongdoing before initiating contact.