A trailer has been released for HBO’s upcoming documentary, Beware the Slenderman, NME reports.

The documentary focuses on the cult internet meme Slenderman that caused a moral panic in 2014 when two teenagers in Wisconsin who tried to murder their friend cited the character as an inspiration for their actions.

Director Irene Taylor Brodsky tells Buzzfeed of the documentary: “The narrative does not revolve around guilt or innocence, but instead the court’s deliberation whether the girls should be tried as adults or children. Above all, it is the anguish and astonishing honesty of the girls’ parents that anchors the film’s narrative to its tragic core.”

Beware the Slenderman will air on HBO in January 23, 2017. It premieres at Doc NYC festival this Saturday (November 12).