Cyrus Mariner

He is a private detective with a drinking problem. Often referred to as Cy Mariner, he first appears in the 3rd novel. He is the main investigator on the Vanderdraak car theft case. He first appears at the beginning of the book when Brixton is looking at the final car of a train. Cy confronts him there where Brixton notices Cy's gun. Cy later captures Brixton and Dana only to take them to the mysterious car.