Uncle Sam is about to execute a prisoner on top of a step pyramid. He looks over his shoulder at ISIL. Uncle Sam: Barbarians!
The problem is that more modern criminal forensics keep finding (through such methods as DNA) some that ARE innocent still in prison for crimes they were innocent of. Even this is not right, but execution is so very ppermanent, so just what does the state (any state, not just Texas) do then?
Besides which, I can not personally imagine a worse sentence than life in prison without even the possibility of ever being parolled!