Murder in the Amish Bakery

When Ettie has problems with her bread sinking in the middle, she turns to her friend, Ruth Fuller, who owns the largest Bakery in town.
When Ruth and Ettie discover a dead man in Ruth's Bakery with a knife in his back, Ruth is convinced the man was out to steal her bread recipe.
It was known that the victim, Alan Avery, was one of the three men who were desperate to get their hands on Ruth's bread secrets.
When it's revealed that Avery owed money all over town, the local detective believes he was after the large amount of cash that Ruth banks weekly.
Why was Alan Avery found with a Bible clutched in his hand? And what did it have to do with a man who was pushed down a ravine twenty years earlier?