One of the UK's most prolific sex offenders ever, David Carrick took advantage of his position as a serving officer to attack women for nearly 20 years.

PC Lewis Edwards was a young officer with a bright future ahead of him, but behind close doors, he was a dangerous and predatory pedophile, who used a fake Snapchat file.

An unknown blackmailer laces dog food with poison and baby food with glass, always able to stay one step ahead of police - until his true identity is revealed.

Australian officers couldn't believe it when they intercepted a call to an international drugs cartel and heard their senior officer Mark Standen on the line.

When police officers are called to reports of an injured man crying in a car park, they’re shocked to discover he is actually a serving Dorset Police Officer.

A young woman is found unconscious in a Manchester hotel. Investigators discover her attacker is her ex and a serving police officer.

A police car executes a stop and search on a drugs courier, seizing hundreds of thousands of pounds - but serving officer Kashif Mahmood then lets the driver go.

Adrian Trevor Moore was a respected officer. He was nominated for officer of the year, but behind closed doors he was a violent and sadistic sex offender.