When it was put to Alexander McCartney that he had, in the words of the Belfast court, “unlawfully killed a female child”, the 26-year-old from Northern Ireland pleaded guilty. That child was just 12 years-old, she lived outside the UK and McCartney had never even met her but, through what the judge described as the worst case of “catfishing” every to come before the courts, his online coercian and blackmail of the child drove her to take her own life.

McCartney was a prolific cyber child abuser - he has admitted multiple offences of causing a child to engage in a sex act, causing a child to engage in sexual activity and sexual communication with a child. The university student from Newry also admitted over 50 charges of blackmail and multiple offences of possessing indecent images of children.

He will be sentenced in May. Irish Time Northern Correspondent Seanín Graham talks to Bernice Harrison about how the global 'catfishing' investigation led police to McCartney's house in rural Armagh.

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