An Accidental Shroud Gil Mayo Series, Book 7.

When local antique jeweller Nigel Fontenoy's body is found at his cousin's building site, DCI Gil Mayo and DI Abigail Moon think they have a simple case on their hands. Both detectives suspect that this murder is a family matter and they needn't search far down the family tree. After all, Fontenoy's cousin, Jake Wilding, was heavily in debt to the dead man and his inability to offer even a vaguely plausible account of his whereabouts on the night...