The Drop Pot Man by K Saunders

At first glance, it appears to be a straightforward shooting accident... 
After ten years with the Greater Manchester Police, Detective Inspector Clare Morell thought she’d seen a lot of baffling cases; but newly assigned to deep in the heart of the West Country, she finds herself in an unfamiliar world. There are shepherds and Romanys, who speak in strange tongues; a Lord Byron lookalike army captain and a lethal killer who just might be an ETA trained hit-man. The strange lowland heath...