I'll Be Gone in the Dark

Amy Ryan

Michelle McNamara's Words (voice)

Joseph James DeAngelo

Self (archive footage)

Adam Drucker

Self - Michelle's Friend

Jennifer Barth

Self - Executive Editor, HarperCollins

Billy Jensen

Self - Crime Writer, Citizen Detective

Paul Holes

Self - Ret. Chief of Forensics, Contra Costa County

Kathleen Conroy

Self - Michelle's Sister

Mary Rita Skrine

Self - Michelle's Sister

Maureen Stratton

Self - Michelle's Sister

Daniel Greenberg

Self - Michelle's Literary Agent

Bob McNamara

Self - Michelle's Brother

Kera Bolonik

Self - Michelle's Friend, Writer

Barbara Rae-Venter

Self - Investigative Genetic Genealogist

Gillian Flynn

Self - Author, Gone Girl

Larry Crompton

Self - Ret. Detective, Contra Costa County

Wes Ryland

Self - Joseph DeAngelo's Nephew

Patton Oswalt

Self - Michelle's Husband

Michelle McNamara

Self (archive footage)