Dear Mr. Gacy is a 2010 Canadian drama thriller film directed by Svetozar Ristovski, starring William Forsythe and Jesse Moss. The film is based on Jason Moss' memoir, The Last Victim. As part of his college thesis, Jason Moss (Jesse Moss) decides to write to serial killers and attempt to gain their trust through impersonating a typical victim or admirer. He reasoned that gaining their trust, possibly learning more about their stated crimes or unsolved murders, was a way to distinguish himself as a job candidate. He sends a carefully crafted letter to John Wayne Gacy (William Forsythe) in prison, portraying himself as a vulnerable boy. The film unfolds as Gacy, suspicious at first, puts Moss through intense emotional tests via letters and collect calls, and an eventual face-to-face visit in prison.