- William Armstrong
- consultant: Inspector, San Francisco Police Dept. (ret.)
- Mark Arneson
- private investigator
- Mark Atherlay
- adr voice artist
- George Bawart
- technical advisor: Detective, Vallejo Police Dept. (ret.)
- Gretchen Belli
- consultant (as Gretchen Belli and the Belli Family)
- Pierre Bidou
- consultant: Chief of Police, Benicia Police Dept. (ret.)
- Lennie Bleecher
- assistant: Mark Ruffalo
- Leanne Boyce
- accounting assistant
- Lisa Breitman
- adr loop group
- Robby D. Bruce
- adr loop group
- Shelbie Bruce
- adr loop group
- Robert D. Brugger
- set medic (as Robert Brugger)
- Doug Burch
- adr voice
- Russell T. Butterbach
- consultant: Sergeant, Solano County Sheriff (ret.)
- Michael Butterfield
- consultant
- Brad Carr
- research assistant: San Francisco
- Kelly Carroll
- consultant: Inspector, San Francisco Police Dept.
- Tada Chae
- research intern
- Donald Cheney
- consultant
- Joseph M. Chiechi
- staff assistant (as Joseph Chiechi)
- Brian Clark
- rigging medic
- Scott Cler
- assistant production coordinator
- David Collins
- consultant: Detective Sergeant, Napa County Sheriff (ret.)
- Roy Conway
- consultant: Captain, Vallejo Police Dept. (ret.)
- Don DiStefano
- consultant: Sergeant, Vallejo Police Dept. (ret.)
- Scott Dropkin
- sparrow head technician
- Jim Dunbar
- consultant
- Brent Ekstrand
- video and computer engineer
- Luigi Ferraro
- Italian dubbing: Inspector David Toschi
- Donald Fouke
- consultant: Sergeant Inspector, San Francisco Police Dept. (ret.)
- Aaron Graysmith
- consultant
- Margot Graysmith
- consultant
- Melanie Graysmith
- consultant
- Robert Graysmith
- technical advisor
- Nicole Greely
- consultant: Lieutenant, San Francisco Police Dept.
- Thomas L. Gunderson
- head animal trainer
- Shepard Hall
- staff assistant
- Marc A. Hammer
- production office coordinator
- Daryl Anthony Harper
- adr loop artist
- Amanda Harrington
- staff assistant
- Benjamin Hartnell
- consultant
- Bryan C. Hartnell
- technical advisor
- Jonathan Hartnell
- consultant
- Monica Hartnell
- consultant
- David Henri
- computer/video operator
- Richard Hoffman
- consultant: Detective, Vallejo Police Dept. (ret.)
- Pam Huckaby
- consultant
- David Emerson Jackson
- consultant: Captain, Vallejo Police Dept. (as David Jackson)
- Mark Jacyszyn
- production supervisor: Captive Audience Prod.
- Holly Kang
- assistant: David Fincher
- Michael Kelleher
- consultant
- Cosmos Kiindarius
- staff assistant
- Jim Knell
- assistant: MUFX producer
- Eric Kops
- publicist
- Meti Kusari
- craft service
- Eric Ladd
- title design
- Derrick Landry
- assistant production accountant
- Kevin Landry
- production accountant (as Kevin E. Landry)
- Teri Lang
- production secretary: San Francisco
- Tammy S. Lee
- staff assistant (as Tammy Lee)
- Chris Lerude
- hands double
- Richard Lonergan
- consultant: Under-Sheriff, Napa County Sheriff (ret.)
- Tim Marion
- assistant: Mike Medavoy
- Jadi McCurdy
- staff assistant
- Kyle McGatlin
- production secretary
- Doug McKay
- assistant to Mr. Medavoy (as Douglas McKay)
- Andrea McKee
- staff assistant
- Gerald McMenamin
- consultant
- Ken Narlow
- technical advisor: Captain, Napa County Sheriff (ret.)
- Ryan Neely
- production assistant
- Cindy Nevins
- payroll accountant
- Melvin H. Nicolai
- consultant: Special Agent, Dept. of Justice (ret.)
- Jason Ninness
- production executive: Phoenix Pictures
- Bill Oaks
- assistant accountant
- Peter K. Orr
- armorer
- Santo Paul Panzarella
- consultant (as Sandy Panzarella)
- Terrence Pascoe
- consultant
- Valarie Payne
- assistant: Jake Gyllenhaal (as Valerie Payne)
- Armond Pelissetti
- technical advisor: Sergeant Inspector, San Francisco Police Dept. (ret.)
- Jeremiah Pitman
- staff assistant
- Neal Prosansky
- staff assistant
- Ron Puckett
- assistant: Arnie Messer
- Lorraine Putnam
- animal wrangler
- Michael Renault Mageau
- consultant
- Shawn Renee-Cadichon
- assistant: Bradley Fischer
- Jimmy Rich
- assistant: Robert Downey Jr.
- John Robertson
- consultant: Captain, Napa County Sheriff (ret.)
- Mike Rodelli
- consultant
- Deandre 'Silky' Russell
- staff assistant (as DeAndre Russell)
- Ed Rust
- consultant: Lieutenant, Vallejo Police Dept. (ret.)
- Caren Sachs
- assistant: Kelley Smith-Wait
- Janine Schiro
- second assistant accountant
- Jim Schiro
- key second assistant accountant
- Bruce Schluter
- title designer
- Derek Schweickart
- data capture assistant
- David Slaight
- consultant: Commander, Napa County Sheriff (ret.)
- Nancy Slover
- consultant: Vallejo Police Dept. (ret.)
- Aaron Smith
- consultant (as Aaron Graysmith)
- David Smith
- consultant
- Hal Snook
- consultant: Sergeant, Napa County Sheriff (ret.)
- Gene Starzenski
- rigging medic
- Jerremy Stewart
- production assistant
- Paula Stier
- assistant production coordinator: re-shoots
- Todd Stolarski
- staff assistant
- Leo Suennan
- consultant
- Candice Taylor
- assistant: Cean Chaffin
- Wayne Tidwell
- supervising engineer (as Wayne R. Tidwell)
- David Toschi
- technical advisor: Inspector, San Francisco Police Dept. (ret.)
- Andreas Wacker
- digital workflow specialist
- Joe Biggins
- inflatable mannequins (uncredited)
- Robert Boas
- i/o support (uncredited)
- Rich Bokides
- film runner (uncredited)
- Lucie Bourgeau
- office staff assistant: re-shoots (uncredited)
- Ritchie Steven Filippi
- set staff assistant: re-shoots (uncredited)
- James Groh
- stand-in (uncredited)
- Marcy Guiragossian
- set production assistant: San Francisco (uncredited)
- Sean Hackett
- development intern (uncredited)
- Seth Hansen
- set staff assistant: re-shoots (uncredited)
- Kurtis Lee Hermes
- production assistant (uncredited)
- Travis Huff
- production assistant (uncredited)
- Dalon Huntington
- stand-in: Donal Logue (uncredited)
- Bud Joseph Hébert
- photo double & stand-in (uncredited)
- Billy Kelly
- stand-in (uncredited)
- Kenneth Ko
- production assistant (uncredited)
- Tony McNitt
- staff assistant (uncredited)
- Timothy Meehan
- staff assistant (uncredited)
- Susanne Mueller
- production assistant (uncredited)
- Aimee Pierson
- staff assistant (uncredited)
- Barry Ratcliffe
- stand-in (uncredited)
- Lisa Russey
- staff assistant (uncredited)
- Brian Sampson
- stand-in (uncredited)
- Gregory Santoro
- set staff assistant: re-shoots (uncredited)
- Yovel Schwartz
- staff assistant (uncredited)
- Greg Silverman
- studio executive (uncredited)
- John H. Tobin
- photo double (uncredited)
- Mike Tsucalas
- set staff assistant: re-shoots (uncredited)
