The only rights is a pistol shot in back of the head !
Why are you being so kind?
There's a great irony here: He did shoot himself in the back of the head -- through his mouth. The irony is that he was able to kill and horribly maim all those people at the Marathon -- he was very successful at that. And yet, after trying to commit suicide by shooting himself in the mouth -- he was unsuccessful.
If he's tried under the Federal jurisdiction (which has the death penalty) versus the State of Massachussets jurisdiction (which doesn't allow the death penalty), then he'll be put to death. Unfortunately, it will be in a humane way -- which is too good for him.