I Am Not a Serial Killer is a 2016 supernatural psychological horror film directed by Billy O'Brien and based on Dan Wells' 2009 novel of the same name.

It premiered at the South by Southwest Film Festival on 13 March 2016 and received limited theatrical and video-on-demand release on 26 August.

[2] John Wayne Cleaver, a teenager in a small Midwestern town, has been diagnosed as a sociopath and harbors homicidal impulses, which are exacerbated by working at his mother April's funeral home as a part-time assistant mortician.

His mother worries about him after the principal summons her to school due to Cleaver's essay about serial killers.

While out trick-or-treating with his friend Max, John spots a drifter lurking outside his neighbor Bill Crowley's house.

While following Crowley and his wife, Kay, on their date night, he comes across his mother and Grant having dinner, upsetting John.

John studies fairytales and mystic folklore, and the police connect the recent murders to a missing person named Emmett Openshaw.

John sees a puddle of black oil and realizes it was Crowley's old leg, which he swapped with Greg's.

On Christmas Eve, John calls Crowley from a pay phone to ask about the process and what he stole from Openshaw.

After a conversation with Grant, John waits until Crowley leaves the house and tries to scare him away by threatening what he loves most: Kay.

When Crowley wakes, the lights flicker, and a large, black, oily monster slides out of his body.

[9] Local extras were utilized as part of the shoot, which concluded on March 20 before the production team moved to other cities in Minnesota including Saint Paul and Golden Valley to film several scenes set during the autumn.

The site's critical consensus reads, "I Am Not A Serial Killer honors the book it's based on with a well-acted drama that leavens its gore and dark themes with wry humor.

[14] Mark Kermode of The Guardian gave it 4 stars and said ''This satirically frightening picture feels like a lost film from another age, from the retro red titles to the analogue score''.