NYTimes: A Big Test of Police Body Cameras Defies Expectations by Amanda Ripley:
The results of the largest, most rigorous study of police body cameras in the United States came out Friday morning, and they are surprising both police officers and researchers. For seven months, just over a thousand Washington, D.C., police officers were randomly assigned cameras – and another thousand were not. Researchers tracked use-of-force incidents, civilian complaints, charging decisions and other outcomes to see if the cameras changed behavior. But on every metric, the effects were too small to be statistically significant. Officers with cameras used force and faced civilian complaints at about the same rates as officers without cameras.