An intelligent, sinuous mystery, ZODIAC is less interested in sensational violence than in the ways that the media affects such violence. Based on the notorious, still-unsolved early-1970s Zodiac murders in the San Francisco area, the movie focuses first on efforts to figure out the murderer's motives and then on the ways that the Zodiac "imagined" himself into public consciousness by writing letters to the
San Francisco Chronicle and leaving clues to taunt the police. The film begins with a murder -- the first one for which the killer took public credit. After the shooting, Zodiac calls the police and sends a letter to the
Chronicle, demonstrating -- in his mind, anyway -- that he's smarter than all of them. As he uses the media to "make himself up," the movie considers the effects of the case on those who pursue him, including Inspector David Toschi (
Mark Ruffalo) and his partner, Inspector William Armstrong (Anthony Edwards); as well as earnest cartoonist Robert Graysmith (
Jake Gyllenhaal) and brilliantly self-destructive crime reporter Paul Avery (
Robert Downey Jr.). They run into problems at every turn, from law enforcement officials in different jurisdictions who don't want to work together to handwriting experts, fingerprinters, and even celebrity lawyer Melvin Belli (
Brian Cox). With egos getting in the way, only rudimentary technologies to work with, and legal impediments, no one cracks the case, and everyone loses themselves to it.