Two Steps to Murder

This is the 26th novel in the Pitkirtly Mysteries series.
When a music festival takes over the town, most people predict some kind of trouble, but the presence of Amaryllis's former colleague Green makes this seem even more likely.
So in the intervals between doughnut breaks, the usual suspects find themselves dealing with two violent deaths and an assortment of temper tantrums, not all from the musicians. Anyone who isn't arrested by a couple of unfamiliar police officers can count themselve...