Scott Roeder consider Dr. George Tiller to be guilty of monstrous crimes, so he walked in to his church one Sunday and shot him to death.
Scott Roeder is actually guilty of a monstrous crime and will live out his natural life.
Doesn't seem quite fair, does it?
Since I oppose the death penalty (for the most part), I won't demand that Roeder face the same fate as his victim; I am just noting the asymmetry of karma in this instance.