We know there are real criminals out there, people who need to go to prison. But what happens when a criminal admits his crimes, but goes to prison for something he swears he did not do -- a notorious double homicide? This is the story of drug dealer Calvin Buari, presented by journalist Steve Fishman in the new podcast Empire on Blood. Fishman talks to us about how he got obsessed with the case for seven years – and what he learned along the way.