Are police untrust worthy

Police officers are hard to predict you never know what there going to do and how they are like as "cops". Cops in some cases have abused and struck brutality on innocent people. Lots of police officers take advantage of there "duties". I know a police officer and hes a great guy! In my case some are harmful and un trust worthy. make sure you follow the rules and you won't have to deal with Officers unless you the un-lucky one to get pulled over for some random test. just hope for the best