Paul John Knowles
- Category : Serial Killer
- Type : GP
- Profile : 1/3 - Investigating / Martyr
- Definition : Split - Small (27,28,54,58)
- Incarnation Cross : RAX Laws 1
Paul John Knowles, also known as The Casanova Killer, was an American serial killer tied to the deaths of 20 people in 1974, though he claimed to have taken 35 lives.