◆ SpookStack

Chapter 4 When requested by @ law en- forcement agency to assist in a vi0- lent crime investigation, the Agents at the Behavioral Science Unit (BSU) of the FBI Academy provide a behavior- mation received from law enforcement about the crime and crime scene, the Agents have developed a technique for classifying murderers into one of two categories—organized or disorga- nized, a classification method evolving from years of experience and knowl- edge. In the service of advancing the art of profiling, the Agents were anx- ious to know if this classification system could be scientifically tested. This article describes the research study and statistical tests performed py a health services research staff on data collected. Objectives of the Study Thirty-six convicted sexual mur- derers were interviewed by FBI Agents for a study on sexual homicide crime scenes and patterns ot criminal behavior. Thesé study subjects repre- sented 25 serial murderers (the murder of separate victims, with time breaks between victims ranging from 2 days to weeks OF months) and 11 sexual murderers who had committed either a single homicide, double homi- cide, or spree murder. ally based suspect profile. Using infor- - Crime Scene and Protile Characteristics Disorganized Murderers « there were significant differences in the crime scenes of organized and disorganized offenders. . - - 33 The major objectives of this study were to test, using statistical inferen- tial procedures, whether there are sig- nificant behavioral differences at the crime scenes between crimes commit- ted by organized and disorganized murderers and to identify variables that may be useful in profiling orga- of Organized and Crime scene of an organized offender investigated by Pierce Brooks in 1958 while a homicide detec- tive sergeant with the Los Angeles Police Depart- ment. (Published by the Federal Bureau of Investigation, U.S. Department of Justice) 115 Reprinted from the FBI Law Enforcement Bulletin, August, 1985. TPA Se