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Part of this killers MO (modus operendi) was to send letters to newspapers which were written in code and always signed with the same alias and symbol. Some theorists believe that his cross circle symbol along with certain cryptic codes were indications as to where the next victims would be found.

  1. The Trailside Killer
  2. The Unabomber
  3. The Zodiac Killer
  4. Jack the Ripper

Answer

The correct answer is C) The Zodiac Killer.

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