Zodiac Killer

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Across
  1. 2. case never been solved
  2. 4. The location for the murders
  3. 5. The grade I'll get for this
  4. 7. Something unknown
  5. 8. Has many signs
  6. 9. Seen in the sky
Down
  1. 1. Bull
  2. 2. what were committed
  3. 3. A zodiac sign in early January
  4. 6. never been solved
  5. 9. a characteristic for the killer
  6. 10. These were left at some crime scenes