Robert Graysmith

Jake Gyllenhaal

Acting

David Toschi

Mark Ruffalo

Acting

William Armstrong

Anthony Edwards

Acting

Paul Avery

Robert Downey Jr.

Acting

Melanie

Chloë Sevigny

Acting

Jack Mulanax

Elias Koteas

Acting

Arthur Leigh Allen

John Carroll Lynch

Acting

Melvin Belli

Brian Cox

Acting

Martin Lee

Dermot Mulroney

Acting

Bob Vaughn

Charles Fleischer

Acting

Mel Nicolai

Zach Grenier

Acting

Sherwood Morrill

Philip Baker Hall

Acting

George Bawart

James LeGros

Acting

Ken Narlow

Donal Logue

Acting

Zodiac 1 / Zodiac 2

Richmond Arquette

Acting

Zodiac 3

Bob Stephenson

Acting

Zodiac 4

John Lacy

Acting

Al Hyman

Ed Setrakian

Acting

Templeton Peck

John Getz

Acting

Charles Thieriot

John Terry

Acting

Carol Fisher

Candy Clark

Acting

Mrs. Toschi

June Diane Raphael

Acting

Darlene Ferrin

Ciara Hughes

Acting

Young Mike Mageau

Lee Norris

Acting

Bryan Hartnell

Patrick Scott Lewis

Acting

Cecilia Shepard

Pell James

Acting

Father

David Lee Smith

Acting

Lab Tech Dagitz

Jason Wiles

Acting

Cabbie / Paul Stine

Charles Schneider

Acting

Shorty

James Carraway

Acting

Jim Dunbar

Tom Verica

Acting

Mike Mageau

Jimmi Simpson

Acting

Belli's Housekeeper

Doan Ly

Acting

Woman

Karina Logue

Acting

Inspector Kracke

Joel Bissonnette

Acting

Riverside Captain

John Mahon

Acting

John Allen

Matt Winston

Acting

Catherine Allen

Jules Bruff

Acting

Terry Pascoe

John Ennis

Acting

Police Commissioner

J. Patrick McCormack

Acting

Duffy Jennings

Adam Goldberg

Acting

Linda del Buono

Clea DuVall

Acting

Sandy Panzarella

Paul Schulze

Acting

Detective #1

Adam Trese

Acting

Mulanax's Secretary

Penny Wallace

Acting

Donald Cheney

John Hemphill

Acting

Man on Marquee

Michel Francoeur

Acting

Copy Editor #1

Thomas Kopache

Acting

Copy Editor #3

Barry Livingston

Acting

Copy Editor #4

Christopher John Fields

Acting

Young David Graysmith

Jack Samson

Acting

David Graysmith

Micah Sauers

Acting

Aaron Graysmith

Zachary Sauers

Acting

Margot Graysmith

Jessica Baltutis

Acting

Patrolman Fouke

Peter Quartaroli

Acting

Patrolman Zelms

Geoff Callan

Acting

Truck Driver

Michael Hungerford

Acting

Society Woman

Anna Katarina

Acting

Informant (Hall of Justice A)

E.P. McKnight

Acting

Informant

Betty Murphy

Acting

Informant

Jeff Daniel Phillips

Acting

Informant

Shane Woodson

Acting

Informant #8

Cookie Crawford

Acting

Uniform Cop

Cassius M. Willis

Acting

Florence Douglas

Judith Drake

Acting

Prison Guard

Phoebe Holston

Acting

Pinole Foreman

Marty Lodge

Acting

Internal Affairs Agent #1

Cooper Thornton

Acting

Internal Affairs Agent #2

Cazimir Milostan

Acting

Kathleen Johns' Baby

Charlotte Ferguson

Acting

Kathleen Johns' Baby

Phoebe Ferguson

Acting

Kathleen Johns' Baby

Kacey Malmsten

Acting

Kathleen Johns' Baby

Karly Malmsten

Acting

Director

JD Cullum

Acting

Staff Editor

Stanley B. Herman

Acting

Distraught African American Male

Roy Lee Jones

Acting

Navy Project Leader

Michael Rose

Acting

DOD Project Leader

James Joseph O'Neil

Acting

FBI Codebreaker

Rod Damer

Acting

Donald Harden

John Sarno

Acting

Bettye Harden

Gloria Grant

Acting

Detective Roy

Brett Rickaby

Acting

Detective #2

M.F. Bernier

Acting

Newscaster #2

Carter Evans

Acting

TV News Anchor

Bill Seward

Acting

Newscaster #4

Dave Nemeth

Acting

Anchorman #1

Ted Garcia

Acting

Interviewer #1

Greg Wolf

Acting

Reporter

Barry LeBrock

Acting

Kathleen Johns (uncredited)

Ione Skye

Acting

Vallejo Desk Ofiicer (uncredited)

David Winston Barge

Acting

Hardware Store Customer (uncredited)

Hayati Akbas

Acting

Camera Man (uncredited)

Brad Carr

Camera

Reporter (uncredited)

Mitchell Fink

Acting

Traveler (uncredited)

Erica Ford

Acting

Informant (uncredited)

Tish Hicks

Acting

Prisoner (uncredited)

Danielle McKee

Acting

Office Worker (uncredited)

Derris Nile

Acting

Janie (uncredited)

Carmen Plumb

Acting

Child Witness (uncredited)

Callie Thompson

Acting

Patrolman (uncredited)

Bud Davis

Crew