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Transcript

Arthur Leigh Allen

  • Many believe him to be the Zodiac killer, although there was never any conformation.
  • Allen was brought in for questioning, but was eventually dismissed

Reasoning

  • Letters to Riverside P.D. were typed on a Royal typewriter, the same brand Allen owned.
  • Allen wore a Zodiac Brand wristwatch, inscribed with the same symbol the killer used as a signature.
  • Lived in Vallejo, worked minutes away from one of the first murder sites.

Connection Between the Zodiac Killer and Arthur Leigh Allen

The Zodiac Killer

  • Between December of 1968 and October of 1969, a serial killer ravaged northern California
  • The murderer sent letters to the San Francisco Police Department claiming his kills.
  • Each of his letters was encrypted with a code, that he claimed would reveal his identity, and signed with a cross-circle symbol.
  • The Zodiac Killer was responsible for at least seven murders (four men and three women)

FBI Profiling Process

Psychology of Profiling

Antecedent: What fantasy or plan, or both, did the murderer have in place before the act? What triggered the murderer to act some days and not others?

Method and manner: What type of victim or victims did the murderer select? What was the method and manner of murder: shooting, stabbing, strangulation or something else?

Body disposal: Did the murder and body disposal take place all at one scene, or multiple scenes?

Postoffense behavior: Is the murderer trying to inject himself into the investigation by reacting to media reports or contacting investigators?

  • Psychologist assist detectives in creating a "profile" of the suspects
  • Profiling is used when investigating organized crime, in which physical evidence is not typically left behind.
  • Profilers rely on behavioral psychology to determine traits of the unsubs.
  • Previous Profilers have developed a set of characteristic associated with serial killers based on previous cases

Behavioral Similarities

Allen= Zodiac

  • The personality traits Allen displayed identified him as a serial killer, while the physical evidence connected him specifically to the Zodiac Killer.
  • Allen had been fired from several of his jobs, due to inappropriate behavior around children
  • Allen had missed several days of work around the time that the murders occurred
  • According to his brother, Allen had started drinking more regularly and gained weight.
  • All of these are behaviors determined by psychologists to be those of a serial killer.
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