The liberal side of me fears that capital punishment is very likely to encapsulate a few instances of the mistaken execution of an innocent man/woman, but when I read the story of this woman who survived the 1994 massacre in Rwanda, I can't imagine the resentment she must feel that the country's cabinet has voted to scrap the death penalty. So while her 17 family members were apparently not worthy of life, the killers are.
Again I say, if countries continue to either turn a blind eye or a lighter sentence onto killers and rapists, they send the message that these are crimes in which the victims may lose everything, but the criminal can live out the rest of his days in shelter and with food, more food than some of the people who starve to death throughout the continent of Africa.
I know execution doesn't allow for the possibility of rehabilitation, but in a country that has starving poor, I'd much rather see money spent on programs to develop independence of the people rather than keeping alive genocidal murderers. In fact, teaching them "to fish" may reduce the number of crimes in the process by reducing the margin between the "have" and "have nots". After all, the Hutus claim that the reason they did it was because the Tutsis were treated as a superior race to the Hutus.
Obviously, there will always be the poor and there will always be suffering (to paraphrase the cool cat, Jesus himself), but if something can be done about it, then by gum we've got to do it.