The worst horror of the criminal justice system is the execution of an innocent person. Time and time again, evidence has shown an unacceptably high risk of convicting the innocent in a criminal justice system that is so flawed. That risk becomes particularly unacceptable when execution is at stake. Between 1973 and 2015, there were 148 exonerations of innocent people from death rows in the modern system. Research suggests that the actual number of innocent people who have been sentenced to death is far higher and that one in every 25 defendants sentenced to death is likely innocent.