The unfortunate pitfall of all of this, of course, is the danger of slipping into the fallacy of gross over-generalizations. The fact is, of course, that the majority of police do not abuse their powers (except in special circumstances such as the Toronto G20 Summit of 2010); it just seems that way thanks to a sometimes-vigilant press and some intrepid citizen journalists.
If you have the stomach for it, read about a Windsor police detective, David Van Buskirk, who has just been found guilty of viciously assaulting a visually-impaired doctor, Tyceer Abouhassan, and lying to cover up the assault. The Windsor Police Association, of course, is falling all over itself explaining away his aberrant and abhorrent behaviour and calling for understanding of the stresses he was under at the time of the beating.
No word yet about the stress Dr. Abouhassan experienced as a result of the assault.