It used to be said that it was the young who distrusted police and authority, while as people aged they became more conservative and comfortable with authority and the police, ostensibly because they had more wealth and position to protect. Al Franken had a sketch on SNL where he explicitly poked fun at this, saying something like "when I was young, I opposed the draft, but now that I am over draft age, I support the draft to protect me, Al Franken... etc. etc."
Oddly enough, I have had exactly the opposite progression. In high school I was a police-loving, authority trusting, border-closing little conservative, cheering on Clint Eastwood and Charles Bronson in 1970's movies where loan heroes fight against the degradation of police departments by civil libertarian pinko bleeding hearts.
The older I get, and the more experience I gain, the less I trust any authority and in particular the less I trust police officers who are given the power to use force and the authority to cover up its misuse. Yet another good example. So Dirty Harry and Death Wish have been replaced in my favorites list by the Wire.