Spellchecker picked “police” instead of “policy,” I bet.
You're probably right. If they've rolled out the body cams and dash board cams, the officers should have been required to attend classes specifically dealing with the use of them, before they were even allowed to use them. They would have been required to undergo a specific period of training in using them. They may have even had to pass a test, and had to sign a form that they fully understood the use and function of the cam, and accepted responsibility for the body cam they were issued. If the Department failed to do that, then they're in trouble.
I worked for NY State, and we were trained once a year in various aspects of the job: First aid, weapons qualification, unarmed defensive tactics, etc. Once we received that training, we couldn't use the excuse of not having known how to react, or how to conduct ourselves any other way while on duty, than the way we were specifically trained. It was the State's way of covering their ass, because if you did anything other than what you had been specifically trained to do, they could, and would hang you out to dry.