unsolved

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Across
  1. 2. Family farm murders
  2. 5. Unsolved murder case
  3. 7. Mysterious hijacker
  4. 9. Child beauty queen case
  5. 10. Hikers' unexplained deaths
  6. 12. Stolen art robbery
  7. 13. Enigmatic manuscript
  8. 14. Mysterious serial killer
  9. 15. Unsolved plane hijacking
Down
  1. 1. Grisly Iowa murders
  2. 3. Mysterious hijacker
  3. 4. Money pit mystery
  4. 6. Code in a book mystery
  5. 8. Unknown man's death
  6. 11. Infamous London murderer