They plant evidence, and regularly lie about what happened in court. No wonder they need body armor, militarized vehicles and weaponry!
http://readersupportednews.org/news-section2/318-66/29570-cops-have-been-setting-up-suspects-with-false-testimony-for-decades
http://readersupportednews.org/news-section2/318-66/29570-cops-have-been-setting-up-suspects-with-false-testimony-for-decades