Actores y actrices
Himself, Columbine victim
Richard Castaldo
Himself, brother of Terry Nichols
James Nichols
Himself, father of victim
Tom Mauser
Herself, principal of Buell Elementary School
Jimmie Hughes
Herself, Columbine student
Amanda Lamante
Himself, County prosecutor, Flint, Michigan
Arthur A. Busch
Himself, author of "The Culture of Fear"
Barry Glassner
Himself, home security consultant
Denny Fennell
Él mismo
Dick Herlan
Himself, former producer of "Cops"
Dick Hurlin
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Himself, Lockheed Martin public relations
Evan McCollum
Herself
Nicole Schlief
Himself, Mayor of Sarnia, Ontario, Canada
Mike Bradley
Shopper in Mall
Mike Epstein
Herself, K-Mart official
Mary Lorenz
Himself, sheriff of Flint, Michigan
Robert J. Pickell
Productores
Productor
Charles Bishop
Productor
Michael Donovan
Productora
Kathleen Glynn
Productor
Jim Czarnecki
Productor
Michael Moore
Productor ejecutivo
Wolfram Tichy
Empresas que han participado
Productora
Alliance Atlantis Communications
Productora
Dog Eat Dog Productions
Productora
Salter Street Films International
Distribuidora España (Estreno en cines)
Alta Films