The risk of executing innocent people exists. If there is death penalty in somewhere will be the case of the death of innocent people. Anywhere in the world, judicial mistakes can be made from time to time. These mistakes can be corrected easily when they are noticed for prison sentences or other kind of penalties. But the death penalty is irreversible and irreparable. It will always available to human failure, so there is always the risk of executing not guilty people even in any developed justice system.