Murder, Mystery, Mayhem.

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Across
  1. 2. clues
  2. 4. chaos
  3. 7. crime solver
  4. 10. not innocent
Down
  1. 1. work out
  2. 3. examination
  3. 5. homicide
  4. 6. details
  5. 8. lawbreaker
  6. 9. enigma