Episode 1
The unsolved murders of women around Green River near Seattle haunt investigators for decades — until crime scene science finally catches up.
Episode 2
A serial killer’s deadly road trip through Florida in 1990 leaves several men dead and spurs investigators to go undercover for an unexpected suspect.
Episode 3
Odd suspects, questionable confessions and ever-shifting stories confuse detectives in the hunt for a young Oregon woman's killer in the early 1990s.
Episode 4
A consequential letter surfaces with stirring claims and upends the seemingly closed case, calling into question the guilt of the convicted criminals.
