Seasons & episodes

A detective in California tracks down a prostitute's killer with the help of a key piece of evidence--fingerprints lifted off two beer bottles found at the murder scene. And two persistent cold case detectives in Kansas City, Mo., use DNA analyses to investigate the 1990 murder of a woman and the death of a man killed in a car crash in 1988.

Michael Johnson was convicted of the senseless killing of Jeff Wetterman, 11 years earlier. While being interviewed in his last days, cameras capture how Michael's family fights to save him from being executed, and the rising tension leading up to the execution date. In a shocking twist, the story ends in a way no one could have foreseen.

Students of the University of Cincinnati and Texas Tech University Innocence Project take on the cases of jailed murderers who claim they're innocent. With exclusive, behind-the-scenes access, viewers watch as the students visit the inmates, track down key witnesses, and seek DNA testing that could prove their clients' innocence. While their focus is on the cases of Texas death row inmate, Anthony Graves, and mentally ill Ohio inmate Glen Tinney, who plead guilty but now professes his innocence.

The Chicago Police Department launches the Women's DNA initiative to fund the testing of backlogged rape evidence kits and help rape victims find justice. Meanwhile in Sacramento County, California, the deputy district attorney hunts for the killer of a man who was brutally stabbed to death in his home 16 years earlier, using a new grant for DNA testing.