Bill Camp

Self - Narrator, Self - Victim

Steven Armentrout

Self - Founder and Chief Executive Officer Parabon NanoLabs

Michel Bryant

Self - Author, Self - Crime Author

Ellen Greytak

Self - Director of Bioinformatics, Self - Parabon Nanolabs

Jim Dresback

Self - Ex-Investigator

Jim Scharf

Self - Investigator, Self - Lead Det., Snohomish County

Bryan Burrough

Self - Writer

CeCe Moore

Self - Genealogy Expert

Beth Dunton

Self - Forensic technician

Kaitlyn Conley

Self - Suspect

Valerie Schremp Hahn

Self - Reporter

Kristen Risinger

Self - Mary's Daughter

Steven Strube

Self - Heather's Husband

Mark Van Namee

Self - Investigator

Beth McGee

Self - Investigator

John Brooks

Self - Suspect

Phil Torsney

Self - FBI Agent

David Zellis

Self - 1st Assistant District Attorney, Bucks County, PA