- Multiple murders: By definition, a serial killer commits multiple murders, usually with a cooling-off period in between, which distinguishes them from mass or spree killers.
- Motive: Serial killers are often driven by a complex mix of psychological, emotional, and social factors. Common motives include power, control, sexual gratification, or a need for attention or notoriety.
- Emotional detachment: Many serial killers exhibit a lack of empathy and have difficulty forming genuine emotional connections with others. This can lead to a diminished sense of guilt or remorse for their actions.
- Antisocial behavior: Serial killers may display antisocial behavior, including a disregard for the rights and feelings of others. Some may have a history of criminal activity, and many exhibit manipulative, deceitful, or aggressive tendencies.
- Methodical planning: Serial killers often plan their crimes carefully, choosing their victims based on specific criteria and employing a signature method of killing. This methodical approach can make it more difficult for law enforcement to catch them.
- Childhood trauma: Many serial killers have a history of childhood trauma, abuse, or neglect, which may contribute to the development of their violent tendencies.
- Narcissism: Serial killers may have a grandiose sense of self-importance, believing that they are superior to others and entitled to act as they please. (Deyyoh!
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- Intelligence: Some serial killers are highly intelligent, using their intellect to elude capture and manipulate others. However, intelligence levels among serial killers can vary widely.
- Compulsive behavior: Serial killers may be driven by compulsions, feeling a strong urge or need to kill that becomes difficult to resist over time.
