All the costing given in that article are for the litigious USA. We are not talking about the USA.
Why not? I was talking about the death penalty, I never specified a country. If you want to talk about a different country that still uses it, like say China, Russia, Iraq, Iran or North Korea, please go ahead and gather the data and we can.
Even if a death penalty trial does cost a bit more, you arent then
paying hundreds of thousands per year looking after them until they die
in possibly 40 or 50 years time.
It's clear you didn't read the studies, those questions are addressed in, well, pretty much any one of them.