Happy Face Killer

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Across
  1. 4. What eventually linked the offender to multiple previously unsolved cases.
  2. 7. Symbol used to sign taunting letters to media and police.
  3. 9. Tone of the letters sent to news outlets about the murders.
  4. 10. Non-essential behavioral element that distinguishes one offender’s M.O. from another.
Down
  1. 1. Occupation that allowed the offender to travel across states undetected.
  2. 2. What happened to wrongful convictions when the real killer came forward.
  3. 3. Type of investigation his letters sometimes revived.
  4. 5. Common location connected to the offender’s travel and victim encounters.
  5. 6. Forensic study of victim traits used to identify patterns.
  6. 8. Type of trucking route that contributed to jurisdiction issues.