STUDIES:
303/
“Camera-friendly policing suggests that raising police visibility may not reveal undisciplined police work, but offer the police a sophisticated mechanism with which to conceal undisciplined police work… to act more disciplined.

Camera-friendly Policing: How the Police Respond to Cameras and Photographers
Surveillance & Society
Vol. 14 issue 1, pp. 78–89,
2016
Comment on this study on its Twitter thread.