Haas, Derek: - Derek Haas is the author of the novels The Silver Bear, Columbus, and Dark Men, which make up The Assassin Trilogy, as well as the novel A Different Lie, also featuring Columbus. Derek co-created Chicago Fire and executive produces Chicago P.D. for NBC. He also co-wrote the screenplays for 3:10 to Yuma, Wanted, and The Double. Derek is the creator of PopcornFiction.com and lives in Los Angeles with his family.