the ghost behind the walls

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Across
  1. 5. ghost of the old man
  2. 6. produces light
  3. 7. no light
  4. 9. the cover for the ducts
  5. 11. dead skin particles and dirt
  6. 12. something that holds pictures
  7. 15. something left behind when someone touched it
  8. 17. a nickname that the kids gave David
  9. 18. the dad of the main character
  10. 19. a ventilation system
  11. 21. the opposite of bro
Down
  1. 1. a building with multiple living areas
  2. 2. an acquaintance of David
  3. 3. the social worker
  4. 4. the old man
  5. 8. a them that is scary
  6. 10. something that can capture places or things
  7. 13. wife of the old man
  8. 14. really white
  9. 16. a dead person
  10. 19. the main character
  11. 20. something people sit on that has cushions