Mass murder
Spree murder
Serial murder
Myths about serial killers
John Wayne gacy
Gacy’s background
Murders
Gacy’s downfall
Bio sources
-head trauma/brain damage or an extra chromosome may be underlying factors
Psychological sources
-unresolved psychological conflict may be an underlying factor
Sociological sources
-enviornmental factors may create a learning experience in which the individual understands how to use violence an becomes desensitized to its effects