Jeff Dahmer
Dr. Matthews
John 'Derf' Backderf
Mr. Burlman
Joyce Dahmer
Bossy (as Brady Dunn)
Shorty (as Michael Ryan)
Lionel Dahmer
Dave Dahmer
Neil
Mike
Moose
Gooch
Bully Jock (as Benjamin Zgorecki)
Ms. Bowles
Oliver Zlatka
Lisa Watkins (as Gaby Novogratz)
Lloyd Figg
Mr. Hicks
Mr. Lapolla
Snarky Slacker
Mr. Fedele
Melody
Musical Director
Mrs. Woodard (as Maryann Nagel)
English Teacher
Penny
Grocery Store Manager
Charlie Smith
Aide
Vice President Walter Mondale (as Thomas J Luce)
Restaurant Manager
Bridget (as Sydney Meyer)
Prom Photographer (as Nick Holstine)
Carol Backderf
Steven Hicks
Freshman Boy (as Zac Brown)
Freshman Girl
Restaurant Patron (uncredited)
Market Shopper (uncredited)
Shopper (uncredited)
Coach Natale (uncredited)
Tennis Coach (uncredited)
Classmate in library (uncredited)
Grocery Patron (uncredited)
Graduating Parent (uncredited)
Scrawney Kid (uncredited)
Shopper / Teacher (uncredited)
Jeffrey's Classmate (uncredited)
Bob (uncredited)
Mall Shopper (uncredited)
Cooper - Jeffery Dahmer Fan Club Member (uncredited)
Washington Staffer (uncredited)
Teacher (uncredited)
Classmate (uncredited)
School Spirit (uncredited)
Student (uncredited)
Dahmer's Classmate (uncredited)
Mall Patron (uncredited)
Neil's Restaurant Waitress (uncredited)
Neil's Date (uncredited)
Mr. Withers - Homeless Man (uncredited)
Prom chaperone (uncredited)
Parent / field trip (uncredited)
High School Student (uncredited)
Parent Chaperone (uncredited)
Mall Visitor (uncredited)
Grocery Cashier (uncredited)
Mall extra / photo shop cashier (uncredited)
Bully / Jock (uncredited)
Prom attendee (uncredited)
Mr. Pitt (uncredited)
Revere High School Teacher (uncredited)
Grocery Store Patron (uncredited)
Radio Disc Jockey (uncredited)
Vice Principal Balderelli (uncredited)
High School Teacher (uncredited)
Ford LTD Driver (uncredited)
Hippie Girl (uncredited)
Scared Mall Girl (uncredited)