Let me count the ways.

Running red lights at will
Speeding through residential streets
Shaking down minorities for money
pulling over pretty women with a fake traffic stop just to try and get their number *this actually happened to my girl*
Using their siren to cut through traffic, only to see that car parked at the highway McDonalds for lunch
Pulling over every brown person they see driving any semblence of a nice car
Lying on a police report to protect a friend who had an illegal gate across an access road causing my brother to lose the use of his right leg
And hundreds of other abuses of power to long a list to type here.

all this hero BS is to condition the populace to accept authoritarian rule without question. There is a story today about police officers forcing **** cavity searches on a poor schmuck because they suspected he had drugs, there were no drugs and the person was just a normal worker. Guess what, they sent a bill for 6k to the guy for the **** cavity searches!!!!

They are fallible people just like everyone else, but their position allows them to be above the law most of the time. Growing up in the inner city, you get to see the not so nice side of the police.