Kill 'em quick. You're right MrsT.
that would definitely make sire there's no cases of successful appeal, like the following:
"Concerns about the death penalty were heightened by the decision in March by Gov. George Ryan of Illinois, a Republican, to declare a moratorium on executions in his state after 13 men on death row there were cleared by new evidence." (DNA evidence cleared them).
Or the 7% US prisoners on death row (on average) found innocent when their case is examined further - (Source: NY Times webpage)
Some further reading:
http://www.truthinjustice.org/
In my opinion, and it is just an opinion, I'm no lawyer, politician or social campaigner, so long as there's a remote risk that one innocent person can be wrongly convicted, the death penalty must be abolished.