Dear Mr. Gacy The shocking true story of one of America’s most notorious serial killers. A chronicle of the interaction between college student Jason Moss and the object of his obsession, serial killer John Wayne Gacy. Details Casts Videos Galleries Posters Title Dear Mr. Gacy Release Date 2010-05-10 Runtime 01 Hours 43 Minutes Genres Crime Drama Thriller Production Companies National Bank of Canada, Reel One Entertainment, Notorious Pictures, Super Écran, Movie Central Network, The Movie Network Production Countries Canada William Forsythe... John Wayne Gacy... Jesse Moss... Jason Moss... Emma Lahana... Alyssa... Cole Heppell... Alex Moss... Belinda Metz... Valerie Moss... Michael Ryan... Frank Moss... Eric Keenleyside... Stan... Daryl Shuttleworth... Guard Thompson... Patrick Gilmore... Glen Phillips... Andrew Airlie... Professor Harris... Michael Kopsa... FBI Agent... Jeffrey Bowyer-Chapman... Male Hustler... Hunter Elliott... Butcher Shop Victim... Michaela Mann... Prostitute... Dee Jay Jackson... Desk Guard... Libby Osler... Counter Girl... Brett Dier... Marcus... James Fredrick Ralph... Armed Guard... Jaren Brandt Bartlett... Mike... Lynn Colliar... TV News Reporter... Richard Harmon... Victim... Andrea Brooks... Stalked Girl... Anthony Shim... Paul... Karissa Tynes... Amy... Josh Goring... Marcus' Friend (uncredite... Kai Kennedy... Bobby (uncredited)... John Andrew Vaas... Undercover Detective (unc... Dear Mr. Gacy Trailer (2010) (Trailer) Original Size (1920x1080) Original Size (1920x1080) Original Size (1000x1500) Original Size (1067x1600) Original Size (851x1200)