The difference between what your asking about is... When punk ass thugz do it, its expected by society already, they are pieces of shit with no reguard for community or peace. So when they kill, assault, steal ect. people get pissed and want them arrested but its already in our mind that, thats what they do...
When cops do that shit, people make a huge deal because not only did they take a pledge to serve and protect our community, but we PAY THEM to do it. So when they murder, assault, steal ect. We get up in arms about it because they are held to a higher standard than just some piece of shit from the streets. We pay them and trust them to protect us, not hurt us. So when they do we need to hold them accountable because its our tax dollars paying these pieces of shit to get away with crimes just because they have a badge....