Tom'un Mary'nin bir seri katil olduğuna dair hiçbir fikri yoktu. - Tom had no idea that Mary was a serial killer.
Seri katil arzularının bir kölesiydi. - The serial killer was a slave to his desires.
English - English
Definition of serial killer in English English dictionary
A person who commits multiple (more than two) murders, especially similar ones with no obvious motive over a period of time with a "cooling-off" period between each murder