ooops, I'm on my girlfriends pc, and didn't notice due to being a hungover div that it had logged in with her credentials...
It would seem from looking at that pdf.. that
http://www.deathpenaltyinfo.org/costs-death-penalty extrapolated 37 million per death from the following stats...
"SUMMARY OF TOTAL COSTS TO THE STATE
We find there are substantial costs to the citizens of Maryland associated with the death penalty.
! 56 individuals received a death sentence – at an additional cost to Maryland citizens of $108
million.
! There were an additional 106 cases where a death sentence was sought but not handed
down – at an additional cost of $71 million.
! The availability of the death penalty has required the state to operate the Capital Defense
Division, with costs more than $7 million for activities not included elsewhere in this study
during the period 1978 to 2008.
In sum, we estimate the total cost of the death penalty to Maryland taxpayers for cases that
began between 1978 and 1999 to be at least $186 million.
A conservative approach was used to develop these estimates. Thus, this estimate does not
include some costs of the death penalty that could not be empirically tested. These include
additional pre-trial costs of cases in which a death notice is filed but subsequently waived, the costs
of cases tried under a death notice that resulted in a not guilty verdict, and costs of appeals to the
United States Supreme Court. If these expenditures could be estimated, they would likely increase
the total cost to Maryland taxpayers."