Blood Hunt (2006)

When muckraking journo Jim Reeve — working on a big corporate greed story — turns up dead, the San Diego police rule it a suicide, but brother Gordon quickly discovers it's murder.
In a former life... Gordon Reeve was a British Special Forces soldier, which comes in very handy. He's a tough guy trained in brutal interrogation techniques.
Bottom Line Fans of Rankin's Inspector Rebus novels ought to enjoy this equally taut, gritty outing.