I, The Jury characters

Appears from the start

A New York private investigator and former soldier. After finding his closest friend murdered, Hammer treats the case as a personal debt and declares that he will kill the murderer himself once he has proof.

Appears from the start

Hammer's close friend and wartime comrade, found shot in his apartment at the opening of the case. Williams once saved Hammer's life, making his death the private investigator's overriding concern.

Appears from the start

A New York homicide detective and Hammer's friend. Chambers leads the official investigation into Jack Williams's death, sharing information with Hammer while warning him that personal vengeance is not lawful police work.

First appears in chapter 3

A poised psychiatrist connected to several people in Jack Williams's circle. Intelligent and self-possessed, she offers Hammer professional insight into the case, and a strong mutual attraction develops between them.

First appears in chapter 2

Hammer's capable secretary and investigative assistant. Velda manages his office, pursues leads, and understands both his methods and the danger created by his promise to avenge Williams.

First appears in chapter 3

A vulnerable young woman whose past links Jack Williams to the city's narcotics and vice world. Her efforts to rebuild her life make her both a source of information and a possible target.

First appears in chapter 4

A polished figure in the criminal underworld whose business interests make him relevant to Hammer's inquiry. Hammer regards his organization as one possible link between Williams's private concerns and the murder.

First appears in chapter 5

A young man in Charlotte Manning's social and professional orbit. His relationships and movements draw Hammer's attention as the inquiry expands beyond the room where Williams died.