Re: And the moral of this story is ...
"Or nice white middle class people now experienced the police [...]"
It was said a few years ago that any tory having any contact with the police became converted to being a liberal.
Confirmation bias is the frequent mental condition expressed by anyone making decisions - particularly if to behave otherwise would affect their core identity, social standing, or career advancement.
Much of my IT trouble-shooting career was spent clearing up messes created by people who ignored any evidence that contradicted their pet theory about a customer bug. I had to resolve the problems created by their "fix" - then diagnose/fix the original root cause.