I used to be in favor of the death penalty. After all, if a murderer takes a life, why should he or she not pay with a life?
There are problems with that philosophy, and serious problems with the death penalty.
For one thing, there are too many documented cases of innocent people having been convicted of serious crimes.
There is the Grisham novel, The Innocent Man, which is based on a true story of an innocent on death row and the effects on him and his family. Chilling.
Giving the government power of life or death over anyone, even a convicted criminal, is placing too much power in their hands.
There is the damage to our national prestige from nations that have already abolished the death penalty.
Finally, there is the question of which is really the most severe punishment: Spending a lifetime in prison, or a quick, relatively painless death? I would think that the former is more severe.
I say, abolish the death penalty. Let the real bad guys rot in prison, where they can't do any more harm to the rest of us, but don't kill them. If they're exonerated, then they can be let out, but they can't be brought back from the dead, at least not yet.