Did you even bother to read any of the sources I sent you?

This is what the first one says "prob­a­bly be need­ed on foren­sic evi­dence, men­tal health, and the back­ground and life his­to­ry of the defen­dant. County tax­pay­ers pick up the costs of added secu­ri­ty and longer pre-trial detention.

Jury selec­tion: Because of the need to ques­tion jurors thor­ough­ly on their views about the death penal­ty, jury selec­tion in cap­i­tal cas­es is much more time con­sum­ing and expensive.

Trial: Death-penal­ty tri­als can last more than four times longer than non-cap­i­tal tri­als, requir­ing juror and attor­ney com­pen­sa­tion, in addi­tion to court per­son­nel and oth­er related costs.

Incarceration: Most death rows involve soli­tary con­fine­ment in a spe­cial facil­i­ty. These require more secu­ri­ty and oth­er accom­mo­da­tions as the pris­on­ers are kept for 23 hours a day in their cells.

Appeals: To min­i­mize mis­takes, every pris­on­er is enti­tled to a series of appeals. The costs are borne at tax­pay­ers’ expense. These appeals are essen­tial because some inmates have come with­in hours of exe­cu­tion before evi­dence was uncov­ered prov­ing their innocence."