Serial murder: The unlawful killing of two or more victims by the same offender(s), in separate events.

- Serial murderers often have families and homes, are gainfully employed, and appear to be normal members of the community. Because many serial murderers can blend in so effortlessly, they are oftentimes overlooked by law enforcement and the public.

- attendees did identify certain traits common to some serial murderers, including sensation seeking, a lack of remorse or guilt, impulsivity, the need for control, and predatory behavior

- interpersonal traits include glibness, superficial charm, a grandiose sense of self-worth, pathological lying, and the manipulation of others

- Psychopaths who commit serial murder do not value human life and are extremely callous in their interactions with their victims. This is particularly evident in sexually motivated serial killers who repeatedly target, stalk, assault, and kill without a sense of remorse

https://www.fbi.gov/stats-services/publications/serial-murder