Upon release of "The Most Dangerous Game" he declared that "man is the most dangerous animal of all", because the movie featured a madman who switched from hunting animals to hunting humans on a remote island. This was the origin phrase used by the Zodiac Killer when he mailed the first part of the 408 cryptogram to the Vallejo Times-Herald on July 31st 1969. Therefore, the loose translation from "The Most Dangerous Game" to "The Most Dangerous Animal" was in fact correct, because of the below quotation by Merian C. Cooper about the movie in the newspapers. It stated "Merian C. Cooper, a recognized authority on jungle life declares man is the most dangerous animal of all".
Recently it was shown that the 1963 movie "Rampage" had all those ingredients, including the phrases "The woman who was the most dangerous game of all" (man is the most dangerous animal of all), "go on the rampage" (go on a kill rampage), "a dozen men" (a dozen people) and the crosshairs over the movie title during the opening credits of the movie. The book "Rampage" by Alan Caillou, the movie poster and original Warner Brothers press book cover, along with the newspapers, contained numerous references to these phrases. It was also ironic that the phrase "man is the most dangerous animal of all" would be placed by the Zodiac Killer within a code, when statewide, the "Rampage" movie would be advertised in the newspapers under the wording "They lived, loved and fought by the code of the jungle" [1] and "His code was to snare everything" [2].. The movie "Rampage" was broadcast on US television on July 20th 1969 (Channel 2), 11 days before the July 31st 1969 letters were mailed by the Zodiac Killer - with the movie advertised in the San Francisco Examiner, Sacramento Bee, Oakland Tribune, Berkeley Gazette and Santa Cruz Sentinel, to name just a few. To read the full story click here.