whodunnit?

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Across
  1. 4. to follow
  2. 5. dead body
  3. 8. trace of finger
  4. 11. person who solves problems
Down
  1. 1. person who kill other person
  2. 2. negotiating against something
  3. 3. person suspected of having committed a crime
  4. 4. proof or evidence
  5. 6. sharp objet
  6. 7. person who has info about the crime
  7. 9. object to shoot
  8. 10. put a blow