Jake Gyllenhaal
Robert Graysmith
Acting
Mark Ruffalo
David Toschi
Acting
Anthony Edwards
William Armstrong
Acting
Robert Downey Jr.
Paul Avery
Acting
Chloë Sevigny
Melanie
Acting
Elias Koteas
Jack Mulanax
Acting
John Carroll Lynch
Arthur Leigh Allen
Acting
Brian Cox
Melvin Belli
Acting
Dermot Mulroney
Martin Lee
Acting
Charles Fleischer
Bob Vaughn
Acting
Zach Grenier
Mel Nicolai
Acting
Philip Baker Hall
Sherwood Morrill
Acting
James Le Gros
George Bawart
Acting
Donal Logue
Ken Narlow
Acting
Richmond Arquette
Zodiac 1 / Zodiac 2
Acting
Bob Stephenson
Zodiac 3
Acting
John Lacy
Zodiac 4
Acting
Ed Setrakian
Al Hyman
Acting
John Getz
Templeton Peck
Acting
John Terry
Charles Thieriot
Acting
Candy Clark
Carol Fisher
Acting
June Diane Raphael
Mrs. Toschi
Acting
Ciara Hughes
Darlene Ferrin
Acting
Lee Norris
Young Mike Mageau
Acting
Patrick Scott Lewis
Bryan Hartnell
Acting
Pell James
Cecilia Shepard
Acting
David Lee Smith
Father
Acting
Jason Wiles
Lab Tech Dagitz
Acting
Charles Schneider
Cabbie / Paul Stine
Acting
James Carraway
Shorty
Acting
Tom Verica
Jim Dunbar
Acting
Jimmi Simpson
Mike Mageau
Acting
Doan Ly
Belli's Housekeeper
Acting
Karina Logue
Woman
Acting
Joel Bissonnette
Inspector Kracke
Acting
John Mahon
Riverside Captain
Acting
Matt Winston
John Allen
Acting
Jules Bruff
Catherine Allen
Acting
John Ennis
Terry Pascoe
Acting
J. Patrick McCormack
Police Commissioner
Acting
Adam Goldberg
Duffy Jennings
Acting
Clea DuVall
Linda del Buono
Acting
Paul Schulze
Sandy Panzarella
Acting
Adam Trese
Detective #1
Acting
Penny Wallace
Mulanax's Secretary
Acting
John Hemphill
Donald Cheney
Acting
Michel Francoeur
Man on Marquee
Acting
Thomas Kopache
Copy Editor #1
Acting
Barry Livingston
Copy Editor #3
Acting
Christopher John Fields
Copy Editor #4
Acting
Jack Samson
Young David Graysmith
Acting
Micah Sauers
David Graysmith
Acting
Zachary Sauers
Aaron Graysmith
Acting
Jessica Baltutis
Margot Graysmith
Acting
Peter Quartaroli
Patrolman Fouke
Acting
Geoff Callan
Patrolman Zelms
Acting
Michael Hungerford
Truck Driver
Acting
Anna Katarina
Society Woman
Acting
E.P. McKnight
Informant (Hall of Justice A)
Acting
Betty Murphy
Informant
Acting
Jeff Daniel Phillips
Informant
Acting
Shane Woodson
Informant
Acting
Cookie Crawford
Informant #8
Acting
Cassius M. Willis
Uniform Cop
Acting
Judith Drake
Florence Douglas
Acting
Phoebe Holston
Prison Guard
Acting
Marty Lodge
Pinole Foreman
Acting
Cooper Thornton
Internal Affairs Agent #1
Acting
Cazimir Milostan
Internal Affairs Agent #2
Acting
Charlotte Ferguson
Kathleen Johns' baby
Acting
Phoebe Ferguson
Kathleen Johns' baby
Acting
Kacey Malmsten
Kathleen Johns' baby
Acting
Karly Malmsten
Kathleen Johns' baby
Acting
JD Cullum
Director
Acting
Stanley B. Herman
Staff Editor
Acting
Roy Lee Jones
Distraught African American Male
Acting
Michael Rose
Navy Project Leader
Acting
James Joseph O'Neil
DOD Project Leader
Acting
Rod Damer
FBI Codebreaker
Acting
John Sarno
Donald Harden
Acting
Gloria Grant
Bettye Harden
Acting
Brett Rickaby
Detective Roy
Acting
M.F. Bernier
Detective #2
Acting
Carter Evans
Newscaster #2
Acting
Bill Seward
TV News Anchor
Acting
Dave Nemeth
Newscaster #4
Acting
Ted Garcia
Anchorman #1
Acting
Greg Wolf
Interviewer #1
Acting
Barry LeBrock
Reporter
Acting
Ione Skye
Kathleen Johns (uncredited)
Acting
David Winston Barge
Vallejo Desk Ofiicer (uncredited)
Acting
Hayati Akbas
Hardware Store Customer (uncredited)
Acting
Brad Carr
Camera Man (uncredited)
Camera
Mitchell Fink
Reporter (uncredited)
Acting
Erica Ford
Traveler (uncredited)
Acting
Tish Hicks
Informant (uncredited)
Acting
Danielle McKee
Prisoner (uncredited)
Acting
Derris Nile
Office Worker (uncredited)
Acting
Carmen Plumb
Janie (uncredited)
Acting
Callie Thompson
Child Witness (uncredited)
Acting
Bud Davis
Patrolman (uncredited)
Crew