Spot the Not #95 - torture and execution

All the following are real cases except one. Can you Spot the Not?

1. nicknamed The Devil's Dancing Bear; he had a private torture chamber in his house

2. invented a death machine and became its first victim

3. invented the iron maiden after he got tired of other torture methods

4. His ancestry was 8 generations of executioners. He beheaded over 3000 people.

5. invented a torture machine that was shaped like his wife

6. invented a death machine to discredit a business rival