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This has also been essential for effective criminal profiling (Keatley, Golightly, Shephard, Yaksic & Reid, 2018). With the increasing number of studies and articles being released about the psychological mysteries involving serial killers, people are learning more about these individuals and their respective motives. Unfortunately, the cultural popularity of serial killers is high in every corner of the world. Because not enough information is known about their individual (and clearly unusual) personalities, serial killers still maintain their behavioral mystery. There is clearly much curiosity in trying to figure out the psychology behind them. There is no doubt that many criminologists, psychologists, sociologists, criminal justice professionals, and even members of the general public attempt to understand “what makes a serial killer” the violent individual that they have become. Be that as it may, genetics, when paired with experiential factors, for example, violent encounters during youth, may cooperate to shape a person in a negative direction. On the other hand, a child susceptible to genetically determined violence does not necessarily, nor consistently, turn into a juvenile or adult criminal. Researchers have found that environment and genetics routinely go hand-in-hand to encourage brutal behavior (Fox, 2017). According to some criminologists, both biological and social factors lead to the making of this type of murderer (Raine, 2008). There is a lot of discussion about what makes a serial killer repeatedly commit such violent crimes. The homicides occur over a short time frame, including a critical time lapse between them (Hagan, 2016). A serial killer is technically defined as a person who murders at least three people, often seeking unusual psychological gratification.