The disappearance of nine-year-old Shannon Matthews in 2008 triggered West Yorkshire Police's largest missing-person investigation since the hunt for the Yorkshire Ripper. The case gripped the nation, drawing in hundreds of officers and volunteers in a desperate search for the schoolgirl.
Three weeks later, the country learned that the disappearance had not been the work of a stranger. Instead, police revealed that Shannon's own mother had been involved in a plot to kidnap her daughter in order to claim a cash reward.
