Well he has been executed as of 9:11 PM (EST), and good riddance. I would have much preferred to have had him fried in an electric chair, though...have him suffer a bit. Lethal injections seem so anti-climatic and unsatisfying.
I feel sick replying to you but it's a myth that lethal injection isn't painful. Potassium chloride is known to be excruciating by itself. That's why they give people sodium thiopental as an anesthetic, but if that wears off/isn't adequately applied with the other 2 parts of the 'cocktail' you're basically rendered paralyzed and undergoing what feels like torture for whatever time it takes for you to die.