Ocean prey
(Book)

An off-duty Coast Guardsman is fishing with his family when he calls in some suspicious behavior from a nearby boat. His hunch is proved right when all three Guardsmen who come out to investigate are shot and killed. They're federal officers killed on the job, which means the case is the FBI's turf. When the FBI's investigation stalls out, they call in Lucas Davenport. And when his case turns lethal, Davenport will need to bring in every asset he can claim, including a detective with a fundamentally criminal mind: Virgil Flowers.