Which scientific development has shown that some persons sentenced to death actually did not commit the crime?

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DNA testing has shown that some persons sentenced to death were actually innocent of the crime for which they were convicted. DNA analysis has been used in many cases to exonerate individuals who were wrongly accused or convicted, resulting in their release from prison or avoidance of the death penalty. The accuracy and reliability of DNA testing has made it a valuable tool for both law enforcement and criminal defense attorneys.

Which Scientific Development Has Shown That Some Persons Sentenced to Death