After two young girls were killed, a mishandled prosecution ended in a murderer walking free until a later, more dedicated investigation brought him to justice.
A missing girl's parents insisted she had just run off with a boy, but detectives persisted and gradually unearthed a sick story of toxic family relationships.
Soon after the corpses of two teens were found, a decades-spanning investigation began, with officers labouring for years to bring the killers to justice.
After a woman disappears, an investigation identifies the likely culprit to be her boyfriend, but despite years of effort he receives only a light sentence.
After a mother finds her son's dead body at his home, detectives begin a lengthy and complicated investigation centred around good old fashioned policework.
When a man was suddenly stabbed to death by a stranger one night in 1994, authorities began three decades of relentless police-work to discover the culprit.
