I do not think death is the answer and I feel that way in most death sentences. The reason is death is the easy way out, there is nothing hard or punishing about it. I think the only prisons should be work camps in which the criminals provide hard labor to help out society. A lifetime of hard labor is far more punishment than a humane death. These guys need some form of actual punishment.
Not bad in theory, but the cost to society in general is too high. Of course, as always, that's just my opinion.