Whilst I respect what police do (and your dad sounds like a really decent guy) I thought I would write up why I don't trust them.
I guess I'm writing this to demonstrate what I have been through to form my opinion. Of course, I simply could have had a run of bad luck, but I think some of the things they've done, or failed to do, are quite serious. As I said I will never participate in cop bashing online or any bullshit like that, but this is why I have issues.
For the record, I hate this sentiment. I dont participate in any police bashing on any forums. I hate not trusting them and am even embarrassed about it to an extent. Hence the throwaway account.
I am a middle class white guy who has no criminal tendencies, let alone record. I consider myself an average joe, but here's my list of run ins with police during my life time.