Final answer:
A person who is NOT a lust killer would not exhibit the typical characteristic of gaining sexual gratification from the act of killing, which is a defining trait of a lust killer. Instead, their motives could revolve around financial gain, revenge, or other non-sexual reasons.
Step-by-step explanation:
To determine which individual is NOT a lust killer among those studied, we first need to understand the characteristics typically associated with lust killers. Lust killers are individuals who commit homicide in a way that sexual gratification is a primary motive, and the act of killing itself is integrated with the perpetrator's sexual desires. They often engage in acts that reflect a deep-seated fantasy life and can involve torture, mutilation, or sexual assault on their victims either before or after death.
To accurately identify someone who is not a lust killer, we would compare the individual's criminal behaviors with the traits commonly found in lust killers. A person not fitting this typology would be more likely to kill for different motives, such as financial gain, revenge, or in the heat of passion, without the sexual component that defines a lust killer. Without specific names, it's impossible to identify who among the potential options is not a lust killer, but the method of exclusion based on the described characteristics would be the approach to take.