As a former cop, I've seen both good and bad cops.  I've also seen how even good cops will not come forward and report bad cop behavior unless they are forced to do so. 

This writer excellently justifies need for cameras. By saying everyone is pre-biased, she justifies the use of cameras so a group of one's peers can make a final decision instead of police policing other police.

I quit the police because of the effect it had on me as a person. I saw that I was losing who I was to the power I had over others and I didn't like it.  I see this same attitude in many peace officers today.  Thank God for the ones that still have the right attitude it takes to be a cop and pray for them to be strong enough to stand up to those who don't have the right attitude.