Chapter 3

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Across
  1. 4. To suddenly become impossible to see or find.
  2. 6. Something that helps prove what happened.
  3. 7. To speak very quietly.
  4. 9. A person who may have committed a crime.
  5. 12. To carefully look at something in order to learn more about it.
Down
  1. 1. A question or message with a hidden meaning that needs to be solved.
  2. 2. A room or floor underneath a building.
  3. 3. A person who investigates crimes and tries to discover the truth.
  4. 5. A secret or strange situation that is difficult to understand.
  5. 8. Something that helps you discover what happened.
  6. 10. A long passage inside a building, usually with doors on the sides.
  7. 11. A person who sees something happen and can tell others about it.