That's a waste, turn them into bio-diesel. The previous inmates could be used to execute future inmates with a Generator.
I am highly ambigious in this matter and have for long time now travelled back and forth between for and against the death penalty. There are many advantages and disadvantages of both having it and not having it and which system to pick is therefore very difficult. The primary problematic of imposing death penalty is that it gives the state a monopoly to murder. One might argue the state killing a killer is quite a paradox. On the other hand, not having the death penalty is both expensive and puts the victims of crime in a situation where they finance the caretaking of their perpetrators through taxation. However, death penalty is a great way of dealing with overpopulated prisons, scaring away people from commiting heavy crimes and also a great way of weeding useless pieces of crap from society. The thought of imposing death penalty for disgusting crimes such as murder and rape comes out as quite reasonable to me. The main problem here is of course what happens if you are innocently convincted and sentenced to death? In general I would say that I am for it. At least for now.