In the age of ubiquitous video and mushrooming oversight, how can you ensure that your use of force does not bring unwanted discredit upon you, your department, and the entire profession? The same as always: Know the law, and comply with it.
Denying officers access to the video records of incidents before they write their reports serves only one purpose: It's a trap. The goal here is to play "gotcha" with the officers and try to catch them in a lie.
Understand that the law throughout this country is that officers are permitted to use objectively reasonable force under the totality of the circumstances, and that means they do not have to use deadly force only if nothing else would work.
If we start punishing officers for every mistake, just because an encounter ended in the justified shooting of a suspect, then officers will surely minimize their contact with suspects.
When the public sees a news video that apparently shows an officer committing excessive force, the incessant media-driven quest for "Justice! Now!" puts false hope in the minds of many that there will be quick and easy answers for complex events.