Showing Down Among the Dead Men by Peter Lovesey

A nightmare discovery in the boot of a stolen BMW plunges car thief Danny Stapleton into the worst trouble of his life. What links his misfortune to the mysterious disappearance of an art teacher at a private school for girls in Chichester?

Orders from above push Peter Diamond of Bath CID into investigating a police corruption case in the Chichester force, and he soon finds himself reluctantly dealing with spirited schoolgirls, eccentric artists and his formidable old colleague, Hen Mallin.