Should we really care?

So ive been following the Albert Brown story for a while now. It looks like he wont be put to death anytime soon, and all because of the drug used in the lethal injection is set to expire. It got me thinking do we really need a more humane way to put death row inmates to death? Albert Brown was convicted for the rape and murder of a 15 year old girl. And we cant kill him because of a simple drug expiring, so we have to wait untill next year. A rope doesnt expire, neither does a bullet. I believe a bullet would be a better option.