Dylann Roof sentenced to death for Charleston church massacre

I don't believe anyone can go in to a place and kill a lot of people without having psychological problems, whether they are cognizant of it or not. For that matter, I don't think a person can kill another single human (except in self-defense) without having severe psychological problems. Are those problems curable? that's a case by case question.

However, I am against the death penalty.
First, I really don't believe any person or group of people should have the authority to decide that someone is too far gone to redeem. To me, all life is sacred, no matter how messed up it may be.
Second, if we're looking to severe punishment, I believe a lifetime behind bars is actually a far more severe penalty than the death penalty.
Third, what about the wrongly convicted? There have been many cases where recent advances in DNA evidence have reversed sentences of those wrongly convicted. If they had been put to death, what then?