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It's only when 35-year-old Virginia McCullough is arrested at her home for the murder of her parents that officers discover her gruesome secret.

A plot to kidnap TV presenter Holly Willoughby is discovered when an undercover cop in the US spots something suspicious in an online chat room.

A plot to kidnap TV presenter Holly Willoughby is discovered when an undercover cop in the US spots something suspicious in an online chat room.

The discovery of a murdered schoolgirl leads to an international manhunt, and the dramatic arrest of her father and stepmother on an airport runway.

After the murders of three schoolgirls, riots break out across Britain. Police are outnumbered but then use cameras to hunt down and arrest rioters.

Armed officers confront a crazed gunman at his home, then discover his terrifying plans to carry out a mass shooting at a school and police station.

An aristocrat goes on the run with her partner and baby in the depths of winter. Police fear the child won't survive, and race to find her.

An affair is exposed, ending in tragedy. Police arrest the suspect and discover the killer's cover-up. Plus, how an arrest solves two crimes at once.