In the news today

[XanBcoo]

I agree the police need policing, but policing is a culture on its own, and judging them based on the untrained eye of the civilian is akin to a kind of ethnocentrism, same as judging any foreign culture from the perspective of your own.

Because that's who will ultimately be making legal decisions based on the viewing of such tapes.

Civilians.

Anyway, you don't need training to understand when cops are out of line. Hundreds of people are arrested every day for good cause because they are morons, but there isn't one example of police brutality that can be justified with a better understanding of "police culture". It's as you say, the police need policing. Always.