Expanding their true-crime catalogue of murder and mystery, Netflix has released a chilling trailer for their upcoming documentary American Murder: The Family Next Door.

Directed by Jenny Popplewell and Oscar-winning executive producer James Marsh, the film intends to “give a voice to the victims”, 34-year old Shannan Watts (who was pregnant at the time) and her two young daughters who went missing in Frederick, Colorado in 2018.

Unlike many other true crime documentaries that focus on thought and opinion of external experts who attempt to dissect the mind of a killer, including the motives and events leading up to the murder(s), American Murder: The Family Next Door differentiates somewhat as it exclusively focuses on archival footage.

Not long after their disappearance, Shannan’s husband, Chris, admitted to killing his family and disposing of their bodies in an oil storage site owned by his then-employer.

The disturbing revelation uncovered a twisted backstory which the filmmakers seek to explore through social media posts, text messages, never-before-seen home footage and law enforcement recordings – some of which was provided by family and friends.

The official synopsis reads:

“In 2018, 34 year old Shannan Watts and her two young daughters went missing in Frederick, Colorado. As heartbreaking details emerged, their story made headlines worldwide. Told entirely through archival footage that includes social media posts, law enforcement recordings, text messages and never-before-seen home videos, director Jenny Popplewell pieces together an immersive and truthful examination of a police investigation and a disintegrating marriage. AMERICAN MURDER: THE FAMILY NEXT DOOR is a the first film to give a voice to the victims.”

Dropping on Netflix on September 30.