The most common trigger for serial killers that we know of, is any form of abuse as a child. However, I could name an endless list of serial killers with mental illness and brain damage, but I could also name an endless list of people with mental illnesses or brain damage that aren’t serial killers or murderers, making us wonder what the bigger factor really is – abnormalities in the brain or having a bad upbringing. 84% of serial killers are male, this therefore meaning that if you are born female your chances of becoming a serial killer are far less, leading us to believe that nature has a big impact. He shot a dog with a BB gun and used bleach to kill a goldfish, there was no information of him ever having a difficult upbringing leading us to think he was born with his anger and pleasure in hurting others. He showed odd and aggressive behaviour from nursery school, He hit other children and destroyed their projects. Many scientists who believe that serial killers become who they are because of nature, believe that Wayne’s aggressive behaviour was caused by the blood clot in his brain, this further proves that serial killers are very much affected by brain disorders, because if John Wayne had not suffered from a clot in his brain he would not have had aggressive tendencies and blackouts.Īnother example of a serial killer is Kohlhepp – he killed 7 citizens A forensic psychologist, says Kohlhepp was troubled from the age of 15 months. At the age of 15, he suffered a blow to the head which had caused a blood clot in his brain, which was only discovered at 16 and he often suffered from blackouts caused by the clot. John Wayne was a serial killer who killed 33 males, it was said he was a perfectly normal boy who was polite and very kind, he had friends and showed no signs of serial killer instinct. This in turn adds to the strength of this argument. People with this disorder have poor emotional regulation as well as making small things cause overly big reactions, so the likely hood of Jeffrey Dahmer having an aggressive response to something little which his victims had done is very likely. Another example is Jeffrey Dahmer who is one of the most well-known serial killers and had borderline personality disorder. Shawcross had a lesion on the MRI, he had an abnormality in the EEG, which could cause bizarre behaviour, which it did since he committed 11 murders, his medical examiners even said that if he hadn’t had brain damage he wouldn’t have become a serial killer (interview with a serial killer), this means that nature was most likely the cause of him becoming a serial killer creating an argument for serial killers being born ‘evil’. But which one plays the bigger role, is it their nature or their nurture?įirst, I am going to talk about nature, genetic make-up and why that has such a large impact on a person. These factors could involve the serial killers’ family and the way their parents have have brought up the child, which could have resulted in psychological damage and as a result created a person that has different values and normalities to everyone else in society. The other factor being their upbringing/nurture, this looks at the impact that external factors have, in socialisation on that particular indivudual. We can split these into two main factors: their nature of when they were born which includes having a mental illness and brain damage if you were born with them or if they happened in an accident. There are certain factors which can drive a person to become a serial killer, medical examiners believe becoming a serial killer comes down to three things: childhood abuse as it creates enormous anger, while neurologic and psychiatric diseases of the brain can damage the capacity to stop urges to violence. Serial killers are a rare breed since only 1% of murders are serial killers. Serial killers kill because of desire and pleasure their sexual desires and the need to fulfill their arousing fantasies leads them to murder, but are they born with this desire or does a bad upbringing cause it? 96% of who serial killers murder are complete strangers which means they have done nothing to harm or upset the serial killer, making it even more cruel as the individual is innocent, but also lacking reason, murderers often kill with reasoning such as revenge, but serial killers do it purely in lust and desire. A serial killer is a person who has killed 3 or more people within the space of a month, with a significant period of time in between them.
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