Dubious bite mark evidence — and the controversial dentist presenting it — cement convictions in the murders of two Mississippi toddlers in the 1990s.

Despite exonerating DNA evidence, Innocence Project lawyers face a racially charged battle in Mississippi to free two men imprisoned for decades.

In a crusade to discredit bogus forensics and raise awareness, the Innocence Project enlists allies including former convicts betrayed by the system.

A drive-by shooting homicide in 1991 stokes an LA gang war. Teen Franky Carrillo is arrested, beginning a nightmare driven by defiant officials.

In 1984, a teen is convicted when multiple rape victims identify him with "100% certainty." Decades into his imprisonment a harrowing truth surfaces.

Shortly after a Philadelphia murder, nearby Chester Hollman is arrested. To guarantee his conviction, police and prosecution cross indefensible lines.

A suspect in a Houston cop's murder has a solid alibi — until his girlfriend suddenly changes her story. Years later she reveals an explosive secret.

A problematic police sketch incriminates a rape suspect in 1994, while a trove of DNA evidence goes untested. Then a determined new lawyer steps in.