The movie marks the debut of filmmaker Brendan Dassey's memoir "Serial," which examines how she wound up living as an alcoholic at age 26 after posting gruesome footage on Facebook about having sex with young boys in 1997. She recounted how she quit drinking because she couldn't shake her insecurity that night and suddenly discovered herself raped by men like Avery.


Though Dassey writes only briefly about Dassey's ordeal in her forthcoming book, Dassey recounts being terrified when Dassey contacted her mother over WhatsApp while Dassey