It's my feeling that all officers should Have a (WORKING) body-cam on their persons at all times. I'm also of the belief that at any time an officer is involved in a shooting, the entire video, uncut, must be released to the public within no greater than twenty-four (24) hours.
You want to restore public trust in the cops? Then make it known that their actions when deploying lethal force will be subject to the review of world + dog. That'll improve their goddamn behavior, which will, in turn, improve the public trust.
"But cops will be afraid to deploy their weapons!"
Good! An officer of the peace is charged with protecting and serving their community, not a foreign soldier charged with taking and holding territory. Deploying a firearm should be the LAST resort, to be deployed on a "This guy is DEFINITELY about to start shooting/stabbing/IS shooting/stabbing" basis, NOT on a "I think this guy might possibly be armed and I don't know whether or not he has any intent to use it on us and I don't care OPEN FIRE!" basis.
Part of being a cop is putting your own personal safety beneath that of the public, and guess what? A member of the public who gets shot for no reason but that his or her skin tone was frightening to a police officer is still a member of the public.
"But, sensitive stuff!"
I'm sorry, but no. If you can say it to an officer of the peace, you can say it to a camera where it can become evidence in a court of law. If you can't, then I'm sorry, but your needs for confidentiality are outweighed by the public interest in having absolute confidence that the police are not deploying physical force, especially terminal physical force, unjustifiably.