In this episode John McGowan-Fazakerley tells the jury how he turned detective to try to piece together what caused his adopted son, Preston Davey, to die. He said he knew now that his trust in Jamie Varley had been misplaced because he hadn't known the extent of the disturbing content on his phone. John McGowan-Fazakerley denied ever abusing or harming Preston - he said the allegations were abhorrent and vile - but he was asked repeatedly why traces of his semen were found on Preston's cot.

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Presenter: Caroline Cheetham and Liz Hull

Editor: Chelsey Ranore

Creative Director: Caroline Cheetham

Production Manager: Vittoria Cecchini

The Trial series uses actors and some voices generated by AI. Their words are taken as verbatim from the official court transcript.

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