A mishandled prosecution ended in a murderer going free until new evidence came about.
In a nine-year investigation, detectives unpick the disappearance of a 17-year-old-girl.
Soon after the corpses of two teens were found, a decades-spanning investigation began.
A woman disappears and an investigation identifies the likely culprit to be her boyfriend.
Detectives encounter a tough case when a mother finds her son's dead body at his home.
After a stranger stabs a man to death, authorities spend years piecing together the case.