Tracy Smith

When an Ohio mother is brutally murdered, a detective pursues the wrong suspects while the real killer walked free; a dedicated sheriff uncovers a real suspect.

Newly developed DNA technology leads investigators to multiple suspects in a 1996 murder case.

When a woman disappears, no one reports her missing for months until she misses an appointment with her hairdresser.

The prime suspect in the murder of an American teacher while living in Seoul, South Korea, in 1988 speaks publicly about the case for the first time in 30 years.

Scott and Kim Richardson, whose daughter Brooke Skylar Richardson was tried for the death of her newborn baby, detail the impact of the case on their family and their daughter.

Parents fight to restore their son's reputation after he is shot dead by a police officer in New York in 2010.