Psychopaths will have the same forms of antisocial behaviour, but they will also be very suspicious and highly paranoid. Robert D. Hare developed the Hare Checklist for psychopathy. It has twenty criteria and the person is scored out of 40 on each criteria. It looks at antisocial behaviour. An average score is 4. A score over 30 means the person is a psychopath in America.
The cut off score is 25 in the UK. The maximum score is The scale is on a continuum. Some psychopaths may not be violent or commit murder, whilst others are. For example, Aileen Wuornos killed seven men in Florida between and Each time, she claimed they tried to rape her, so she acted in self-defence. She was a serial killer and received a death by lethal injection in He killed in America and Denmark. He moved from Denmark to America when he was seven.
He killed his mother with the help of his father and was imprisoned in America. On his release, he moved back to Denmark where he met a woman called Marianne Pedersen. He killed and dismembered her and her two sons. But why do Murderers Kill? Unfortunately, there is not always an obvious answer here either. We can study murderers and see what they did, try to understand their life, their childhood, their experiences and we can hope that it will lead us to an understanding of why a person might kill.
This, ultimately, will hopefully help psychological profilers to develop effective methods of catching criminals quickly and effectively. If you are interested in learning more about psychology and behaviours take a look at our hour courses:. Psychological Assessment BPS Criminal Psychology BPS Follow this link to preview and learn more. Why Do People Kill? Holmes and Holmes thought that there were two types of hedonistic killers — Lust Killers — Those who get sexual pleasure before and after the victim is dead.
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After speaking with members of the Avielle Foundation , named for a six-year-old victim of the Sandy Hook Elementary School shooting, the two researchers spearheaded a study of more than incarcerated young males, 20 of whom had been convicted of homicide, held at a maximum-security detention facility within the state.
As in the current study, Cope and Kiehl deployed the mobile scanner to collect MRI scans of the incarcerated teens in New Mexico and discovered differences between those who had committed homicide and their imprisoned peers. When Kiel compared the data from that study with the results of his latest project, he found a high degree of overlap.
Koenigsberg notes that homicidal violence can itself be split into two categories : impulsive and instrumental. Impulsive violence is born of unbridled emotions and overblown reactions, a brand of behavior linked to poor frontal lobe functioning and abnormal serotonin levels. Instrumental violence, on the other hand, is premeditated and is associated with other brain changes, such as reduced amygdala activation during emotion processing.
Koenigsberg, Vogel, and Kiehl all note that the structural data collected in the current study cannot on its own be used to predict who has committed homicide, let alone who might in the future.
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