I watch a lot of murder/crime documentaries, and it's pretty obvious that most people get away with most things. The police only catch bottom feeders. The innocent are pronounced guilty all the time.

The justice (revenge) system has an order of operations. If you want to kill someone's wife simply frame the husband. No body, no crime. The only smart people that go to jail are either extremely unlucky or are a victim of their own hubris and over-ambition.

Have you ever wondered why shows like Law and Order: Special Victims Unit are so popular? They paint the opposite picture. The bad guy always gets caught just in the nick of time. It's a feel good fantasy so people can rest easy about the state of the world and forget about the fact that citizens are getting gunned down in the streets for no other reason than racism.