Complex sentence: They discover that Hunter Redfern is behind the blood feast, and Rashel remembers him as the ruthless vampire that killed her mother but she finds out that Timmy was turned into a vampire at the age of four and raised by Hunter.
Split into simpler sentences: They discover that Hunter Redfern is behind the blood feast, and Rashel remembers him as the ruthless vampire that killed her mother. She finds out that Timmy had not been killed; he was turned into a vampire at the age of four and raised by Hunter.