A recent study published in the European Journal of Criminology makes the case that the use of police body cameras actually increase the likelihood of a police officer being assaulted. It’s the opposite as one might think.
The study speculated that if an officer tells a suspect a camera is on, it may escalate the situation into an assault but how many officers actually tell a suspect that? A more probably answer and the study eluded to it is that with cameras running, police officers are “less assertive” which makes them more vulnerable to an assault.
You can read the complete study here.