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. Includes excerpts of Ben Field’s sermon recorded by the Olney Baptist Church. Reporter: Jo Black Producer: Victoria Farncombe