Investigating American serial killer Arthur Shawcross, who killed the majority of his victims after being paroled early following a conviction for murdering two children

The story of Alexander Pichushkin, who aimed to kill 64 people - one for each square on a chessboard - but was caught before he could complete his task

The unsolved case of the Monster of Florence, who preyed on young couples and committed seven murders in and around the city, but who has never been officially identified

In-depth investigations into infamous criminal cases and uncovering the motives behind them and the procedures used to arrest the perpetrators

The story of Belgian Marc Dutroux, who kidnapped, tortured and killed children, and why 300,000 people took to the streets in protest at the handling of his case

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In-depth investigations into infamous criminal cases and uncovering the motives behind them and the procedures used to arrest the perpetrators

Profile of female serial killer Aileen Wuornos, whose year-long killing spree left seven men dead, and whose story inspired the film Monster, starring Charlize Theron

The hunt for the Suffolk Strangler, who murdered five prostitutes in the Ipswich area during 2006, leading to the largest manhunt since the Yorkshire Ripper