Netflix is set to launch the original true crime documentary American Murder: The Family Next Door – produced by UK-based Knickerbockerglory — this September.

In 2018, 34-year-old Shanann Watts and her two young daughters went missing in Frederick, Colorado. As details of the case emerged, Watts and her daughters made headlines worldwide.

American Murder: The Family Next Door weaves together archival footage that includes social media posts, law enforcement recordings, text messages and never-before-seen home videos to piece together an examination of a police investigation and a disintegrating marriage.

Jenny Popplewell (Channel 4′s My Big Fat Gypsy Wedding) serves as director. James Marsh and Jonathan Stadlen are executive producers.

American Murder: The Family Next Door premieres Sept. 30.