A body is discovered seven weeks after Libby Squire's disappearance, and police try to find the evidence needed to charge the man they believe is responsible

The case of Wolfgang Schmidt, a transgender German serial killer who murdered five women and an infant

Nikki Sue Entzel dials 911 to report a fire at her home, but the supposed accidental house fire turns into a murder investigation

A profile of Lancashire-born double-killer Andrew Dawson, who branded himself the 'Angel of Mercy' after murdering two neighbours in their Derby flats in 2010

Officers in Wiltshire are out in force on the M4 to track down drug-dealers

Documentary following members of the New Zealand highway patrol as they witness the best and worst behaviour on the nation's busiest motorway

Documentary following members of the New Zealand highway patrol as they witness the best and worst behaviour on the nation's busiest motorway

Documentary following the work of Ireland's border force officers as they fight to stop gangs of organised smugglers from bringing drugs, money, guns, cars and even exotic animals into the country

The innocent party in a three-car collision ends up on the wrong side of the law. Police rescue two motorists caught short of fuel and a 300-ton load needs moving up the A1

Police face a tough task to free a fragile driver. Traffic cops seize a car being driven with no insurance or licence and a major crash forces the closure of the road for nearly six hours

Fly-on-the-dashboard documentary showcasing outrageous road disasters, captured in video form by drivers' in-vehicle dashboard cameras

PC Dave Smith and his Belgian shepherd Kelly race to the scene of a burglary at a pet-food store, but when the suspects are found to have fled the scene, police helicopter India 99 is used to help track them down. PC Adele Gibson and her sidekick Diesel take part in a dawn drugs raid, and the London heats of the annual police dog trials give PC Andy Miller's dog Nelson the chance to test his skills. Narrated by Ken Stott

After a badly decomposed body is found in a suitcase by a railway embankment in Exeter, police hunt for the killer with only CCTV evidence to go on

Mum Karen Doubleday was found murdered in the woods near her home in 2002. The clue to finding her killer lay in pollen spores from the Ice Age

The life and crimes of American serial killer Daniel Lee Siebert, who was convicted of three murders but confessed to many more

An investigation into the murderous mother and son Sante and Kenneth Kimes, who killed their elderly landlady in a greed-fuelled ploy

After finding Susan Eyre dead in a bath full of bleach, detectives narrowed her killer down from 210,000 possible suspects

After a badly decomposed body is found in a suitcase by a railway embankment in Exeter, police hunt for the killer with only CCTV evidence to go on

The chilling story of Mark Martin, who murdered three homeless women in his quest to become Nottingham's first serial killer