Execution of an innocent man

[highwaystar101]

MrBubbles said:

there are plenty of cases where the killer is absolutely known and the death penalty can be administered without any possibility of mistakes.

anders breivik is an example of such a case.
or there was a man on a bus in canada a couple years back. he beheaded a fellow passenger and ate parts of his body.

sometimes there is absolutely no question about who committed the crimes.

So do you only support the death penalty for those few small cases beyond reasonable doubt like Breivik, or do you think it's fine the way it is?