Twenty-five years ago today, an Illinois court overturned Gary Dotson’s conviction for rape and aggravated kidnapping after DNA tests performed on the biological evidence in the original rape kit excluded him as the perpetrator. This was the first exoneration of an innocent prisoner in this country based on post-conviction DNA testing, and it was not the last. According to data compiled by the Innocence Project in New York City, post-conviction DNA evidence has since yielded 316 other exonerations in the United States.
What have we learned from these DNA exonerations? Scholars have examined these cases in search of what went wrong.