Two years ago, the world was left stunned after a 12-year-old girl was stabbed 19 times by her two closest friends after being lured out into the woods during a slumber party.
According to the pair, who have both been diagnosed with mental illness, they were told to commit the atrocious crime by the infamous internet creation, Slenderman.
HBO has since made a documentary centering on the incident while also exploring the darkest corners of the internet and how they influence children’s thoughts.
Titled Beware the Slenderman, the first trailer for the Irene Taylor Brodsky directed documentary has arrived online, splicing together footage from the trial and CGI renderings of the faceless fictional boogeyman.
The 10 Best documentary DVDs
The 10 Best documentary DVDs
1. Great Barrier Reef
This three-part documentary with Monty Halls explores the 3,000 reef systems and the tens of thousands fish and animal species that live in the Great Barrier Reef.
2. Hell and Back Again
Filmmaker Danfung Dennis follows US Marine Nathan Harris who was shot in Afghanistan in 2009 and struggles to adjust to his life back home. Sobering viewing.
3. When The Levees Broke
Spike Lee's take on the Hurricane Katrina disaster and the botched government response is more than a documentary; it's an oral history, told by the people that lived it.
4. Britain's Lost Routes with Griff Rhys Jones
There's just enough babble, mixed with drovers, bearded cattlemen and rough sailors to satisfy without this becoming self-congratulatory.
5. Life on Land
Life on Land brings together 15 of David Attenborough's discs from his 20-year natural history journey looking at groups of living organisms that share our planet.
A feature-length dance documentary from Wim Wenders with the ensemble of the Tanztheater Wuppertal charting the life and inspiring work of Pina Bausch.
7. Wonders of the Solar System
Professor Brian Cox visits some of the most inhospitable places on earth to explain how the laws of physics carved natural wonders.
8. A Bigger Splash
Jack Haran's film takes its name from David Hockney's famed painting. It charts, without his official participation, the artist's love affair with Peter Schlesinger.
9. Frozen Planet
This exploration of the Arctic and Antarctic, both of which Sir David travelled to, boasts lovely scenery, wild elements and more animal life than you can poke a stick at.
10. George Harrison: Living In The Material World
Directed by Martin Scorsese, this film weaves together childhood footage, interviews with George's friends and live performances.
Slenderman, also known as Slender Man,was originally created in 2009 as part of a Photoshop competition on the internet forum Something Awful.
The goal was to make normal photographs appear paranormal, with one user submitting two black and white photos depicting groups of children to which he added a tall, faceless figure wearing a black suit.
Soon after, the posts went viral, with fanart, cosplays and online fictional stories about the Slenderman being created: famously, a video game - titled Slender: The Eight Pages - was released in 2012 and has since been downloaded over two million times.
Beware the Slenderman airs on HBO 23 January 2017.Reuse content