Study Estimates 4% Of Death Row Inmates Should Be Exonerated

Given enough time and attention, one in every 25 death row inmates would be exonerated, according to a study in the Proceedings of the National Academy of Sciences:

The rate of erroneous conviction of innocent criminal defendants is often described as not merely unknown but unknowable. There is no systematic method to determine the accuracy of a criminal conviction; if there were, these errors would not occur in the first place. As a result, very few false convictions are ever discovered, and those that are discovered are not representative of the group as a whole. In the United States, however, a high proportion of false convictions that do come to light and produce exonerations are concentrated among the tiny minority of cases in which defendants are sentenced to death. This makes it possible to use data on death row exonerations to estimate the overall rate of false conviction among death sentences. The high rate of exoneration among death-sentenced defendants appears to be driven by the threat of execution, but most death-sentenced defendants are removed from death row and resentenced to life imprisonment, after which the likelihood of exoneration drops sharply. We use survival analysis to model this effect, and estimate that if all death-sentenced defendants remained under sentence of death indefinitely, at least 4.1% would be exonerated. We conclude that this is a conservative estimate of the proportion of false conviction among death sentences in the United States.

By: Cheston Catalano

Cheston Catalano is a Kentucky-based journalist whose work has been featured in the Chattanooga Times Free Press and the Clarksville Leaf Chronicle. He is a long-time contributor to Liberaland.