Co-director Laura Ricciardi was a lawyer before turning to film making, which came to great use when researching the legal aspects of the case.
Before meeting with Netflix, Demos and Ricciardi met with executives at PBS and HBO, but neither network was interested in the project.
The State of Wisconsin vs. Steven A. Avery (2016) updates the case with information not included in the documentary. Includes interviews with a victim, a prosecutor and Kathleen Zellner, the defense attorney. Return to Manitowoc County: The State of Wisconsin vs. Steven A. Avery (2017) revisited the case once more.
TV-show "Convicting a murderer" by Candace Owens, is a recently released follow up on the Avery case.