The curious incident of the dog in the night-time

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Across
  1. 1. Christopher's mothers name.
  2. 4. Christopher's neighbor.
  3. 5. Estranged husband of Eileen Shears.
  4. 8. The dead dog's name.
  5. 10. Author Christopher doesn't like.
  6. 12. 3 red cars.
  7. 15. 4 yellow cars.
  8. 16. Resident of Randolph Street. One of the many neighbors whom Christopher interviews during the course of his investigation.
  9. 17. The one thing Christopher feels comfortable around.
  10. 18. Elderly resident of Randolph Street.
  11. 21. The brother of Christopher's father.
  12. 22. Christopher’s primary teacher at school.
  13. 23. Resident of Christopher’s block. Another interviewee, he lives with and cares for his disabled mother.
Down
  1. 2. The maxim that assumptions introduced to explain a thing must not be multiplied beyond necessity.
  2. 3. Christopher’s first primary teacher at school.
  3. 4. Subject Christopher is really good at.
  4. 6. Famous detective.
  5. 7. 5 red cars.
  6. 9. Author of The curious incident of the dog in the night-time.
  7. 11. Christopher's fathers name.
  8. 13. Christopher’s brown and white pet rat.
  9. 14. 4 red cars.
  10. 16. Christopher’s school principal.
  11. 19. Christopher's Father’s co-worker.
  12. 20. The psychologist at Christopher’s school.