The Old Success — Martha Grimes

In The Old Success, the twenty-fifth mystery in the bestselling Richard Jury series by MWA Grand Master Martha Grimes, an unlikely trio of detectives teams up to solve three puzzling murders that span three counties across England.
When the body of a French woman washes up on a wild inlet off the Cornish coast, Brian Macalvie, divisional commander with the Devon-Cornwall police is called in. Who could have killed this beautiful tourist, the only visible footprints nearby belonging to the two little girls who found her?

While Macalvie stands in the Scilly Islands, inspector Richard Jury -- twenty miles away on Land's End―is at The Old Success pub, sharing a drink with the legendary former CID detective Tom Brownell, a man renowned for solving every case he undertook. Except one.

In the days following the mysterious slaying of the Parisian tourist, two other murders take place: first, a man is shot on a Northhamptonshire estate, then a holy duster turns up murdered at Exeter Cathedral in Devon. Macalvie, Jury and Bronwell set out to discover whether these three killings, though very different in execution, are connected.