and allowing a response team into the prison to retrieve the body after the prisoner has died or been executed by lethal injection.

Skip that step. No need to bother injecting excess toxins. Anaesthetise then go straight to the preservation.

I voted the post up because it is a good question, even if the answer is easy. Especially easy since in Australia we consider the practice of capital punishment itself barbaric. I did not see why merely asking the question warranted penalty.