So by your own admission
Genetic technology and other tools are making it harder and harder to punish innocent people for crimes. Since this is the case, you can sleep easier knowing that when someone is executed in the future that they probably are guilty of the crime.
There may be a few people who have been executed by mistake, but the number of victims that have been savaged by released criminals are legion. But then they don't really matter do they? Too bad so many children have had to be raped and murdered because liberals like yourself think that vile predators should be given a second...and third...and fourth...and fifth chance.