The end of David Fincher Zodiac Reflects the sad truth of a real-life crime - the evidence simply isn't there to name Arthur Leigh Allen the Zodiac Killer. Allen was a prime suspect in a truly baffling case, but how ZodiacAs the end shows, the mountain of circumstantial evidence is not enough to incriminate Allen before he died of a heart attack. Zodiac is based on the book of the same name by Robert Graysmith, who is a prominent figure in the film. His book chronicles the mysterious serial killer's reign of terror over Northern California. in 2007 Zodiac Movie,…