Texas loves tossing innocent people in prison; we have 'privatized' a lot of the system and they operate according to cherished libertarian and conservative principles: the state should guarantee them a profit and plenty of prisoners.
I'm opposed to the death penalty for many of the same reasons I oppose abortions; the state shouldn't have the power to kill it's citizens nor should it have the power to allow others to kill citizens. It is in fact cheaper to give them life sentences with no parole, if no other reason suffices, and this in turn increases the chances of correcting all too common mistakes and railroad jobs by the Court system. Chuck Colson's arguments as well as the conservative view of limiting state power.
Having said that, we shouldn't care much over the what the UN thinks; it's 'Human Rights Chairman' recently was Omar Khaddafi, after all, and Mexico is a corrupt country that doesn't give a **** about its citizens or their 'rights' in the first place, and should also be ignored just as they routinely ignore American rights; kidnapping Americans and shaking them down is a regular industry there.