This document discusses the differences between male and female serial killers. It defines a serial killer and provides typical profiles for male and female serial killers. Male serial killers tend to be younger, use more violent methods like stabbing or shooting, and are often sexually motivated. Female serial killers prefer discrete methods like poisoning and tend to be motivated by money. The document also includes charts showing gender differences in methods and motives over time, with females becoming more discrete killers and increasingly motivated by finances.