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Modus Operandi

Modus Operandi. The perpetrator's modus operandi (method of operation or M.O.), which describes the tools and strategies used to carry out the crime . It demonstrates some of the suspect's behavior that, in turn, is linked to their personality. Modus Operandi.

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Modus Operandi

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  1. Modus Operandi

  2. The perpetrator's modus operandi (method of operation or M.O.), which describes the tools and strategies used to carry out the crime. • It demonstrates some of the suspect's behavior that, in turn, is linked to their personality. Modus Operandi

  3. A psychological profile is a tool that can help crime investigators by telling them the kind of perpetrator they are seeking. Began in the Federal Bureau of Investigation (FBI) Behavioral Science Unit during the 1960s Psychological profile

  4. Psychological profile • Psychological profiling has been used in the pursuit of serial killers. • Also to the investigation of product tampering, poison pen letter writing, serial bombing, serial rape, kidnapping, arson, and single murders.

  5. A profile works best if the offender displays some form of mental disturbance such as employing torture or mutilation. • Some take a trophy away from the victim, possibly an item of no obvious value but of deep symbolic significance to the perpetrator. • They may also use a signature, which is a behavioral sign such as positioning the corpse in a certain way or tying a ligature with a complicated knot. Psychological Profile

  6. Organized Offender • Plans the crime, sometimes in great detail, bringing tools and taking them away again. • Takes care not to leave evidence behind and will also hide or dispose of the body. • Average to high intelligence with a stable lifestyle. They normally tend to be married and employed. Types of Offenders

  7. Disorganized Offenders • Leaves a mess. They don't plan or bring tools; instead they use whatever is to hand to carry out their attack. • Lives alone or with a relative, may be unemployed, of lower intelligence, and have a history of mental illness. • Their attacks are often accompanied by considerable violence. Types of Offenders

  8. Mixed Offender • Shows mixed characteristics of the first two types. • While their approach may be carefully planned, the assault itself may be frenzied, showing a person losing control over deep-seated urges and fantasies. Types of Offenders

  9. “Vampire of Sacramento” (1978) • Richard Trenton Chase • murdered a woman and drank her blood • At the crime scene investigators: • Noted the disorder at the scene and, from a study of body type and mental temperament, concluded the murderer was white, thin, undernourished, and in his mid-twenties. As a disorganized type, he'd be unemployed and live alone. • Found him soon after a 3rd killing spree and was exactly as they profiled him

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