Okay, listen up, Alf:
You have no personal knowledge to support the second sentence of this claim.
When I went to cop school 101, I never had this alleged class we all get that tells us to try to convict innocent people. Can you please show me the curriculum in any police academy - federal, state or local - or criminal justice course in any college anywhere in the States which teaches this?
In short, your post isn't even based, by its own terms, on anecdotal evidence to support your wildly absurd assertions. If this is based upon your personal interaction with one or a few individual police officers, then it's hardly fair (and definitely not logical) to draw from that some general statement applying to all police officers everywhere.
Hell, I'd be willing to say that I know more cops than you do and I haven't yet run into one who goes to work every day (or even occasionally) with the explicit idea in his/her mind to find ways to bring charges against the innocent. They're usually too busy dealing with the ready supply of people actually breaking the law to have the kind of time to just make stuff up to charge people with. Oh yeah, and they aren't d-bags.
People usually go into law enforcement out of a sense of duty to their community and a genuine desire to ameliorate the pain victims of crimes actually live with. And as a general proposition, they usually have well-defined moral compasses.