Speaking out: The victims of a prolific online abuser

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Alexander McCartney, from County Armagh in Northern Ireland, was a relentless and remorseless abuser. Police think he targeted three and a half thousand children across the world. In what's become known as the UK's largest catfishing case, he took on a false identity in order to exploit and blackmail his victims into sending him explicit photos. Our Ireland correspondent Chris Page hears from three of his victims, who hope speaking out will encourage more people to report similar crimes. (Image: PA PSNI)