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On the surface, he was the charming, caring young man who gave sermons in his father's Baptist church. But Ben Field had a sinister project: to seduce vulnerable individuals and get them to change their wills.

5 Live’s Jo Black takes an in-depth look behind the murder investigation that shook one street in the picturesque village of Maids Moreton, Buckinghamshire.

Peter Farquhar was one of Field's victims. His brother Ian told Jo: "My brother would still be alive if he hadn't met Ben."

Listen to Killer in the Congregation on Â鶹ÊÓƵAV Sounds.