I couldn't care less. His actions were hideous, but their consequences upon the victims, their families, and society are not one whit less if he dies now or later, painlessly or in agony.
Making my happiness contingent upon the degree of justice in the world does not seem like a good plan. I'm not advocating apathy here, but I think it's better to engage where one might actually be able to make a difference. Clifford Olsen doesn't qualify--hence my disengagement with his fate since he has been safely imprisoned.