On Wednesday, Miami-Dade prosecutors say they will ask a state judge to vacate Luis Diaz's convictions and sentences based on DNA evidence that was not available 25 years ago.
Mr. Diaz says he was never a rapist. So do his children, former wife and colleagues. But in 1980, eight assault victims swore otherwise, and that was enough to send Mr. Diaz, a fry cook and father of three, to prison for life.
Lawyers for Mr. Diaz, now 67, say that his case is the best evidence yet that witnesses can make devastating mistakes, and that such testimony, however earnest and convincing, cannot be trusted.