They don't, because then they would be treated very poorly, and in the case of Frank Serpico, left to die. They're basically like the mob, but with badges and legally allowed to carry firearms.
Null and void has a ping list which, as it turns out, is mostly negative when it comes to the police.
Was there any reason for this? Or would you like to give a solid reason?
Cherry picking is an art. One can find examples of anything from good to bad in any field or profession.
Trump so often expressed huge support for law enforcment. And funny thing is that the demsheviks are the ones who hate law enforcement and want to defund and abolish it.
Consider that for a bit.