With unprecedented access, this documentary series enters the dark world of the biggest online predators investigated by the National Crime Agency (NCA). Gripping bodycam footage shows NCA officers arrest respected university researcher and lecturer Matthew Falder. Never-seen-before archive of Falder's interview, records how he boasted to his victims that he would never be caught. Falder is revealed to have over 14,000 indecent images and 1,251 videos of children. And his online alias, 666Devil, targeted victims worldwide. Compelling NCA surveillance footage reveals that Falder is carrying out his double life, unaware that the net was closing in.

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