With more than 235 million copies of his books in print, John Grisham is one of the best-selling storytellers of all time. And what a story he's about to tell tonight: "The Innocent Man" is John Grisham's 19th book, but it's no novel... this story is real life.

It's about murder, mystery, and a small town where the innocent end up behind bars.

First, two innocent men were convicted of murder. Now, Grisham says, two more men, tried and convicted in the same small town, may also be innocent. Are they?

Hoda Kotb brings us John Grisham's first true-crime mystery.

Join us for Dateline NBC, tonight at 8 p.m./7 c.