Sin-Jin Smyth is an unreleased horror film written and directed by Ethan Dettenmaier, based on the urban legend surrounding Kansas's Stull Cemetery.

The story involves the Devil simultaneously appearing in two places, the high plains of India and one cemetery in Kansas every Halloween at midnight.

The film stars Roddy Piper, Jonathan Davis (vocalist of the nu metal band Korn), Richard Tyson, Don Stroud, and Jacqueline Moore and also features Kevin Gage, Camden Toy, Billy Duffy (guitarist of the hard rock band The Cult), and Charles Cyphers.

On November 2 (The Day of the Dead) two federal marshals report to a jail in Shinbone, Kansas, to transfer a prisoner, known as Sin Jin Smyth, during the tornado warning.

There was speculation as to whether the movie will ever be released, but IMDb revised the project status in January 2007 to “post-production”, even though principal photography had yet to be completed.