Solve the crime

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Across
  1. 4. red liquid in your body
  2. 5. hold up a bank
  3. 9. where a crime took place
  4. 12. with a rope
  5. 13. traces you leave when you touch objects with your hands
  6. 14. clues you need, to find the culprit
  7. 17. with a gun
  8. 18. building where the police work
  9. 19. try to extort money from people by threatening to reveal their secrets
  10. 20. person who is guilty
Down
  1. 1. a female member of a police force
  2. 2. a male police officer
  3. 3. killer
  4. 6. procedure to determine what happened and find out who is guilty.
  5. 7. a special police unit specialised in scientific analysis
  6. 8. not innocent
  7. 10. a pair of metal rings a police officer puts on you when they arrest you
  8. 11. kill
  9. 15. any object you can use to kill or harm someone with
  10. 16. person who breaks into houses to steal (money; jewels; cars….)
  11. 17. with a knife