Forensic Detectives

Examining how some killers leave personal marks on their victims. But with the help of hi-tech forensics, police use the marks to capture the killer. S6, Ep8

Not Forgotten. A man risks everything to find his sister's killer - can a sympathetic detective with a great theory help him? Plus, a sexual predator is getting away with murder. S6, Ep10

When a makeshift cemetery is uncovered by a road, detectives realise a serial killer is at large. Will they be able to catch him before he murders more women? S6, Ep11

Police rely on a drop of blood to determine a missing person's fate. Plus, when a woman is hit by a train, is a killer covering his tracks? S6, Ep12

A man is convicted of the murder of a little girl snatched during a game of hide-and-seek. After a 20-year campaign, could new DNA evidence set him free? S6, Ep13

Dismembered human remains are found in a grocery bag on a riverbank - will detectives be able to piece together the victim's identity and catch a killer? S6, Ep14

A makeshift coffin conceals a body - can insects help cops identify the corpse? Plus, a parasite expert proves murder when a woman is found in a dumpster. S6, Ep15

When a missing teenager is found murdered, a piece of rope provides the only clue to the killer's identity. And, police struggle to build a murder case without a body. S6, Ep18

When homicide investigators meet crime writers, it transpires that real-life stories are often stranger than fiction. S6, Ep16