The method of execution is more troubling than the actual execution, I feel. Tells me who the ones who probably take the most pleasure in it. Lethal injection is the most humane method, and since the botched electrocusion in Florida the preferred method for those on death row in Florida but Florida still employs it as an alternative. Only a truly sick fuck would want the alternative. But there are still states that have hanging, firing squad, gas, etc., as their primary method (though I think lethal injection is supposed to be on the table), and the fact that most prisons and correctional facilities (at least in the southern states) are owned and run by private companies: everything seems more about profit rather than any sense of rehabilitation.
If the evidence for those put on death row was 100% 100% of the time, I'd be for it in concern only to the worst murderers, child rapists, and serial rapists out there but since it's not, and never will be and frankly it's a revenge method rather than a "justice" method, it should be wholly abolished.