They never learn the appropriate responses to trauma, and never develop other emotions, which is why they find it difficult to empathize with others. Trauma is the single recurring theme in the biographies of most killers As a consequence of this trauma, they suppress their emotional response. Many serial killers are survivors of early childhood trauma of some kind – physical or sexual abuse, family dysfunction, emotionally distant or absent parents. The book explores how our understandings of serial killers – called “monsters” before the advent of modern psychology – have changed over time, and considers answers to a difficult question: what, exactly, “makes” a serial killer? Peter Vronsky is t he author of Sons of Cain: A History of Serial Killers from Stone Age to the Present, a book that explores why some people become killers, and others don’t. Are serial killers a product of nature (genetics) or nurture (environmental factors)? The current method is relatively novel, and in need of expert systems interfaces to improve speed and application, which is outlined in the current study.One of the oldest questions in criminology – and, for that matter, philosophy, law, theology – is whether criminals are born or made. This research serves as a proof of concept that, with more advanced means of data collection, may be a useful tool for law enforcement for linking serial homicides. The results showed there were no statistically significant differences between the three of Bundy's victims, however there was significant difference between 11 of the 17 facial measurements of Bundy's victims when compared to a random person. A random subject from an online database was used as a comparison. To test this, three of Ted Bundy's victims were randomly selected and anatomical landmarks were located and measured to produce proportionality indices of their faces. The current research was undertaken to propose a technique, termed face similarity linkage, to evaluate whether victims of a serial killer have statistically more similar facial measurements than a randomly chosen person of the same gender. Therefore, multiple victims of a single serial killer are likely to have some facial features and geometries that are similar. Some sexually motivated serial killers target victims on the basis of appearance.
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