Death in a Cold Spring — Cecilia Peartree

This is the ninth novel in the Pitkirtly Mystery series.
It's a cold spring in Pitkirtly. Amaryllis's campaign to be elected to the local Council is approaching a conclusion, and the local minister has set up the Face of Pitkirtly art exhibition to show off the creativity of the young people of the area.
Things begin to go wrong soon after two young artists arrive unexpectedly at the Cultural Centre to set up their artwork. Before long gruesome discoveries are made, people go missing and are sometimes found again, and Keith Burnet of the local police force suffers from a sudden work overload.