Tracer

Z Ellis has always believed he is the twin brother of mass murderer Adam Russo, even though Z was adopted by a loving family when he was five. What he doesn't know is that he and Adam are actually the same person and that a special department of the FBI—the Eradication of Violent Crimes—has overwritten his memories with new ones through a bio-software program called Tracer in the hopes of creating a model citizen out of the Charles Manson-like mass murderer. The experiment has been successful for ten years.

But when Z witnesses a car accident and the woman dies in his arms, the sensory experience triggers shadows of real memories, leaving Z to wonder if he is going as insane as his brother.

Z is contacted by FBI Agent Gage McAlister, an agent who has been on administrative leave for the past three years following the accidental shooting of a teenager. Gage is the architect of the Tracer bio-software and the one responsible for writing Z's new memories. His responsibility for the teenager's death has made him question his judgment about everything, including taking away Adam Russo's free will by overwriting his memories.

Even as Z begins to discover who he is, Gage himself is on a journey to make things right, even if it means restoring the memories and motivations of a mass murderer.