Monster producer Clark Peterson is set to produce Dear Mr. Gacy, a film based on the true story of college student Jason Moss, who became infatuated with serial killer John Wayne Gacy.

According to The Hollywood Reporter, William Forsythe (The Rock, 88 Minutes) will play Gacy, while Jesse Moss, who stars in Paramount's current release The Uninvited will play the role of Jason Moss.

European director Svetozar Ristovski will make his English-language debut with the feature, directing from a script by Kellie Madison. Gordon Yang is also producing, while Tom Berry and Madison are exec producing.

The project is based on the memoir "The Last Victim" by Jason Moss, who began corresponding with Gacy in 1994, the last year of the killer's life. Moss eventually met Gacy on Death Row and even narrowly escaped an attack by him.

The twentysomething went on to gain a measure of celebrity from his interactions with Gacy, but his story ended tragically when he committed suicide in 2006. His book has been described by critics as a real-life Silence Of The Lambs.

"The theme here is once you encounter that kind of darkness, it's hard to escape it," Peterson said. "Jason seemed to be a success because he had this encounter with John Wayne Gacy, wrote a book and went on television. But ultimately it came to a tragic end."

The project is slated to begin shooting in Vancouver this month. Berry's Reel One is financing.