A consequential letter surfaces with stirring claims and upends the seemingly closed case, calling into question the guilt of the convicted criminals.

Odd suspects, questionable confessions and ever-shifting stories confuse detectives in the hunt for a young Oregon woman's killer in the early 1990s.

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.

The unsolved murders of women around Green River near Seattle haunt investigators for decades — until crime scene science finally catches up.