David Johnson and where he is now after train passenger's disturbing discovery

The true crime documentary has returned to screens with yet another disturbing investigation

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The two-part documentary series offers unprecedented access into a court room

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The documentary has returned, plunging viewers into real life emergencies

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The new series has so far left viewers horrified 'to the core'

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New episodes are released every week and the first instalment has left viewers stunned

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The series investigates chilling crimes across the UK and often leaves viewers speechless

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