Some observers have described the made-for-cable The Riverman as a real-life Silence of the Lambs. Based on the book cowritten by Robert Keppel, formerly chief criminal investigator for the attorney general of Washington state, the film recounts Keppel's efforts to track down serial killer Gary Ridgeway, aka the Green River Killer. With 10 unsolved murders weighing on his mind, Keppel (played by Bruce Greenwood) agrees to a plan whereby an imprisoned mass murderer with a similar M.O. will be brought into the investigation in hopes of second-guessing the killer at large. Thus, Keppel travels to Florida, there to inaugurate a series of chilling interviews with the infamous Ted Bundy (Cary Elwes). Inasmuch as Bundy hopes that by helping track down the Green River Killer he himself will be able to escape the death penalty, Keppel finds himself between the proverbial rock and hard place: How can he secure Bundy's cooperation without making promises he cannot possibly keep? The Riverman was first telecast by the A&E network on September 6, 2004.