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Twenty-year-old Alexander McCartney from Northern Ireland is questioned by police after a 12-year-old girl in Scotland reports serious catfishing online.

A huge discovery on McCartney’s devices triggers an international investigation as the race to identify thousands of victims across the world gets under way.

Homeland Security discovers an obituary page for a 12-year-old girl in West Virginia. Police in Northern Ireland connect the death to McCartney, opening a manslaughter investigation.