Crime documentary investigating cases of couples murdered by their own children. The first episode focuses on Stephen Seddon, who tried to kill his parents in a fake crash, but was then hailed as a hero for saving them. But his evil intentions hadn't got him anywhere

Detectives look back on the case of Elijah Butler, murdered four days after he married his wife - by her long-term stalker

Colin Sutton looks back at the murder of an 18-year-old, and how the young killers who took turns to kick his head and body were caught

Following Australia's traffic enforcers as they deal with high-speed chases, defiant hooligans and explosive crashes

Following Australia's traffic enforcers as they deal with high-speed chases, defiant hooligans and explosive crashes

The City of London Police tackle crime on the streets of the capital, focusing on the theft of motorbikes

Police rush to the rescue after a caravan overturns on the A1, while traffic officers hurry to deal with two vehicles abandoned in dangerous spots

Traffic officers are called out to help a motorist stranded in freezing conditions, and a driver is caught red-handed using her mobile phone behind the wheel

An accident leaves a biker fighting for his life, and officers track down pedestrians taking a dangerous path along the carriageway. A crash leaves a driver with worrying injuries

A countdown of the most incredible, hilarious and spectacular real-life crashes in the world - all caught on dashcam

Sgt Midgley tries to qualify as a dog handler after 24 years on the force but 14-month-old springer spaniel Ruby puts both their futures in jeopardy. The Greater Manchester Police dog squad remembers a close call with football fans during the 2008 Uefa Cup Final, and the 55-strong team deals with a siege involving a man with a knife, who is threatening to kill his family. Narrated by Ken Stott

How detective David Baker became the first person to use DNA profiling in a criminal investigation, when looking for the killer of two young girls in 1986

After mum Michelle Gunshon disappeared, police found CCTV footage showing her with a mystery man. They managed to track him down, but where was she?

A profile of David Berkowitz, the serial killer who found himself at the centre of New York's biggest manhunt after a vicious shooting spree that left six dead

The crimes of Lonnie Franklin, an American serial killer who was given the nickname the Grim Sleeper, and was responsible for at least 10 murders and one attempted murder in Los Angeles

How detective David Baker became the first person to use DNA profiling in a criminal investigation, when looking for the killer of two young girls in 1986

How police used CCTV, eyewitness statements and a public appeal to find the killer of a 28-year-old woman, found dead on Nottingham's streets

The story of 30-year-old church warden Ben Field, who was jailed in 2019 for the murder of Peter Farquhar, 69, whom he duped into a fake relationship and persuaded to change his will, before drugging him with a cocktail of pills