Well, some people have no impulse control and can’t stop to think “hey this is all going to get caught on camera” if someone triggers their sensitive wittle feewings.
Screening process for cops should probably screen for that. I imagine the military screens those people out pretty well by letting drill sergeants scream all kinds of abuse in their faces and then seeing which ones can’t take it without cracking.
True...
That would help but on a given day, when that final straw is thrown on the camel's back - the camel will misbehave. This may have been the last straw for the cop.