杰夫瑞·达莫

Jeffrey Dahmer

饰：Himself

E·迈克尔·麦肯

E. Michael McCann

饰：Himself - Prosecuting Attorney

杰拉尔德·P·博伊尔

Gerald P. Boyle

饰：Himself - Defense Attorney

Pat Kennedy

饰：Himself - Detective from Milwaukee Police Dept.

Frederik Berlin

饰：Himself - Psychiatrist for the Defense

Carl Wahlstrom

饰：Himself - Psychiatrist for the Defense

帕克·迪茨

Park Dietz

饰：Himself - Psychiatrist for the Prosecution

Laurence C. Gram Jr.

饰：Himself - Judge

Dorothy Straughter

饰：Herself - Mother of Man Killed by Dahmer

Janie Hagen

饰：Herself - Sister of Man Killed by Dahmer

Rita Isbell

饰：Self - Sister of Man Killed by Dahmer,(archive footage) (as Rita Isbel)

Elkan Allan

饰：Self - Host

Jeffrey Connor

饰：Self - Friend of Man Killed by Dahmer,(archive footage)

Lionel Dahmer

饰：Self - Jeffrey's Father,(archive footage)