For one why should the state have the power over life and death especially when mistakes are made?

Then who decides? Seems like you’re saying the alternative is for the state to decide to keep them locked in a cage for decades before they wither and die while we pay for it.

Note that I said I only support it when the evidence undeniably proves they committed the crime.

For another you know the death penalty cases cost more due to challenges and stuff like that,

Then maybe we should change the process. Again, I said I only support it if the evidence is immutable. So why allow any delays in a situation like that? Should be quick and inexpensive beyond the initial trial.