[1] http://en.wikipedia.org/wiki/United_States_incarceration_rat...
[1] http://en.wikipedia.org/wiki/United_States_incarceration_rat...
Given the huge number of Prisoners who have been on death row and exonerated, there must have been quite a few in the past prior to technologies like DNA testing.
http://en.wikipedia.org/wiki/Wrongful_execution
Note - this doesn't even include those who were innocent, but not provably so.
For example, New York had a death penalty in 1995 that was never used and declared unconstitutional in 2004. Since the death row has been disbanded by executive order and it is unlikely executions will ever take place in NY again.
43 immates were executed in 2012.
http://en.m.wikipedia.org/wiki/Capital_punishment_in_the_Uni...
I was more pondering, how many people in the past have been executed wrongly by the united states.
A quick google search suggests that 14,634 were executed in the period 1608-1987. http://www.deathpenaltyinfo.org/executions.php