David Allmand

David Allmand is the California Highway Patrol investigator who responds to the scene of Roland Mackey's murder. The investigator indicates that Mackey was struck by the "disabled" car awaiting a tow and that the car pulled forward and struck the back of the tow truck a second time.

Atkins

Mrs. Atkins is the counter clerk at Hillside Preparatory, the school Rebecca Verloren attended when she was murdered. Mrs. Atkins checks the school records to confirm that Roland Mackey was never a student at Hillside Prep. Later, Mrs. Atkins finds Kaitlyn Sobek so that Bosch can question her about her cell phone, which was used by Roland Mackey's killer.

Harry Bosch

Heironymous Bosch, known to most by his nickname Harry, is a detective for the Open-Unsolved Unit of the Los Angeles Police Department. He is over fifty years old, and he has just returned to the police force...