Watery Grave: GOODBODY & the ECO WARRIOR MYSTERIES

It had rained for days and the River Mull, which sliced through the market town of Mulberry Hollow, was in danger of bursting its banks in some areas of the town.
In a centuries-old graveyard which backed onto the river, parts of the ground quickly became sodden and unstable. It was inevitable that the old wall and then the ancient cemetery would crumble away into the fast-flowing current, taking with it the old coffins. To make matters worse Reverend Raymond Toffey's wife reported him missing.
As fears for his safety grew, bodies were spotted floating down the river amongst the accumulation of mud and debris.
At first it was thought they were a few of the corpses torn from their rotting wooden coffins by the torrent of water, but it quickly became obvious that these deaths were more recent, and they'd been murdered.
As the town battled on against the forces of nature, it was Mulberry Hollow CID, along with unasked for help from a couple of amateur sleuths, who set out to solve the murders.
They had to find the killer or killers, and motive, but maybe the answers to these puzzles went back over time?