Psycho Crossword Puzzle

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Across
  1. 5. Peter Kurten's first victim
  2. 6. His justification for the crimes
  3. 7. Peter Kurten's last victim
Down
  1. 1. Execution device used on Kurten
  2. 2. "Vampire of Dusseldorf"
  3. 3. Paul Berg's book written about Kurten's crimes and psychology
  4. 4. Reason why Kurten told his wife Frau to turn him in