Serial killers are people who kill on at least three occasions with a break in between each murder. The crimes commited are a result of a compulsion that may have roots in the killer's (often dysfunctional) youth and psychopathological disorders, as opposed to those who are motivated by financial gain (e.g., contract killers) or ideological/political motivations (e.g., terrorism, democide).
The term allows criminologists to distinguish those who kill several people over a long period of time from those who kill several people during a single event (mass murderers). A third type of multiple killer is a spree killer.
The following are brief definitions of these three types:
All of the above types of crimes are usually carried out by solitary individuals. There have been examples in all three categories in which two or more perpetrators have acted together. Author Michael Newton states that this happens in about a third of the cases. Lee Boyd Malvo and John Muhammad, who together committed the Beltway sniper attacks, are prime examples of spree killers.
There are other types of multiple killings as well, although they often involve larger organizations than two or three perpetrators: genocide and terrorist attacks.
Serial killers are generally, but not always, male. Noted female exceptions include Aileen Wuornos, Myra Hindley, and Erzsébet Báthory.
In some cases, a serial killer will plead not guilty by reason of insanity in a court of law. This defense is almost uniformly unsuccessful. In most US jurisidictions (i.e., the states), the legal definition of insanity is still generally based upon the classic common law "right or wrong" test delineated by an English court in the 1843 M'Naghten case. The M'Naghten rule, as it's generally known in the legal profession, hinges upon whether the defendant knows the difference between right and wrong at the time of the offense. With some serial killers, extensive premeditation, combined with lack of any obvious delusions or hallucinations that would hinder the defendant's ability to elude detection after committing multiple murders, make this defense extremely difficult.
Serial killers frequently have extreme sadistic urges. Ones who lack the ability to empathize with the suffering of others are frequently called psychopathic or sociopathic, terms which have been renamed among professional psychologists as antisocial personality disorder. Some serial killers engage in lust and torture murder, loosely defined terms involving, respectively, mutilation for sexual pleasure and killing victims slowly over a prolonged period of time.
The element of fantasy in serial killer's development cannot be overemphasized. They often begin fantasizing about murder during or even before adolescence. Their fantasy lives are very rich and they daydream compulsively about domination, submission, and murder, usually with very specific elements to the fantasy that will eventually be apparent in their real crimes. Others enjoy reading stories of sadism, packed with rape, torture and murder. In some cases, these traits are not present.
Some serial killers display one or more of what are known as the "MacDonald Triad" of warning signs in childhood. These are:
Many experts have claimed that once serial killers start they cannot (or only rarely) stop. Recently this view has been called into question as new serial killers are caught through methods that were previously unavailable, such as DNA testing. Some argue that those who are unable to control their homicidal impulses are more easily caught and thus overrepresented in the statistics.
This figure has often been exaggerated. In his 1990 book Serial Killers: The Growing Menace, Joel Norris claimed that there were five hundred serial killers active at any one time in the United States, claiming five thousand victims a year, which would be approximately a quarter of known homicides in the country. These statistics are regarded as suspect and unsupported by evidence. Some have argued that those who study or write about serial killers, be they employed in the judicial profession or journalists, have a vested interest in exaggerating the threat of such offenders.
In terms of reported cases, there appear to be far more serial killers active in developed Western nations than elsewhere. There are several reasons that may contribute to this:
Although the phenomenon of serial murder is generally regarded as a modern one, it can be traced back in history, albeit with a limited degree of accuracy.
In the 15th century, one of the wealthiest men in France, Gilles de Rais, is said to have abducted, raped and killed at least a hundred young boys. The Hungarian aristocrat Elizabeth Báthory was arrested in 1610 and subsequently charged with torturing and butchering as many as 600 young girls. She stated in her diary all of her kills. Although both De Rais and Báthory were reportedly sadistic and addicted to murder, they differ from typical modern-day serial killers in that they were both rich and powerful. Based upon the lack of established police forces and active news media during those centuries, it may very well be that there were plenty of other serial killers at that time who were either not identified or not publicized as well.
Some historical criminologists have suggested that there may have been serial murders throughout history, but specific cases were not adequately recorded. Some sources suggest that legends such as werewolves and vampires were inspired by medieval serial killers.
Thug Behram, a gang leader of the Indian Thuggee cult of assassins, has frequently been said to be the world's most prolific serial killer. According to numerous sources, he was believed to have murdered 931 victims by strangulation by means of a ceremonial cloth (or rumal, which in Hindi means handkerchief), used by his cult between 1790 and 1830, thus holding the record for the most murders committed by a single person in history. In total, the Thugs as a whole were responsible for approximately 2 million deaths according to Guinness. The notoriety of the Thugs had eventually led to the word thug entering the English language as a term for ruffians, miscreants, and people who behave in an aggressive manner towards others.
In his famous 1886 book Psychopathica Sexualis, Richard von Krafft-Ebing notes a case of serial murder in the 1870s, that of an Italian man named Eusebius Pieydagnelle who had a sexual obsession with blood and confessed to murdering six people. The unidentified killer Jack the Ripper slaughtered prostitutes (the number of victims is not known) in London in 1888. Those crimes gained enormous press attention because London was the center of the world's greatest superpower at the time, so having such dramatic murders of financially destitute women in the midst of such wealth focused the news media's attention on the plight of the urban poor and gained coverage worldwide. Joseph Vacher was executed in France in 1898 after confessing to killing and mutilating 11 women and children, while American serial killer H. H. Holmes was hanged in Philadelphia in 1896 after confessing to 27 murders.
A significant number of serial killers show certain aspects of both organized and disorganized types, although usually the characteristics of one type will dominate. Some killers descend from being organized into disorganized behavior as their killings continue. They will carry out careful and methodical murders at the start, but as their compulsion grows out of control and utterly dominates their lives, they will become careless and impulsive.
Herbert Mullin slaughtered 13 people after voices told him that murder was necessary to prevent California from suffering an earthquake. (Mullin went to great pains to point out that California did indeed avoid an earthquake during his murder spree.)
Ed Gein claimed that by eating the corpses of women who looked like his deceased mother, he could preserve his mother's soul inside his body. He killed two women who bore passing resemblances to his mother, eating one and being apprehended while in the process of preparing the second woman's body for consumption. He also used the flesh of exhumed corpses to fashion a "woman suit" for himself so that he could "become" his mother, and carried on conversations with himself in a falsetto voice. After his arrest he was placed in a mental facility for the remainder of his life.
Some serial killers may seem to have characteristics of more than one type. For example, British killer Peter Sutcliffe appeared to be both a visionary and a mission-oriented killer in that he claimed voices told him to clean up the streets of prostitutes.
Alternatively, another school of thought classifies motive as being either: need, greed, or power. That said, all crime can be divided into one of these three categories.
Serial killers, despite the media attention, commit only a tiny fraction of all murders in any time period. Murder is usually either a crime of personal relationships and short intense emotion, or an unintended consequence of other crimes. Because of this, most murders are comparatively simple to solve; in most familial deaths, the murderer makes little effective effort to conceal the crime and confesses easily; in other cases, the murderer is usually a local or is known to the police. These assumptions, with which any law enforcement officer naturally approaches a single murder, are barriers to catching a serial killer.
Another barrier to serial killers' early capture is their diverse backgrounds, choices of victim, and methods of killing. They almost never have any links to their victims—they pick by whim or impulse, seeking types or opportunity rather than any easily detectable link. As noted above, organized offenders can take steps to minimize the evidence they leave behind, and commit crimes away from their locale. It can take a number of murders before a serial killer is even suspected.
Even if a serial killer is known to be operating, it is difficult to catch the culprit. Potential victims can be identified only by broad type, and generic area warnings produce little more than fear and misdirected violence.
In addition, police departments are often reluctant to admit they have a serial killer on their hands due to the immediate public pressure on them to catch them that quickly ensues. Law enforcement departments are known to try and "wait it out" hoping the killer will move to another jurisdiction, rather than publicly admit they have a killer on their hands.
The commonality of habitual traits of serial killers allows the construction of a psychological profile. This allows targeted interviewing of suspects, although there are often a large number of entirely innocent individuals who have some match to the profile. Also, some serial killers are skilled at concealing their true selves behind a charming facade.
Unfortunately, profiles are built upon historical precedents of known serial killers that sometimes do not accurately model actual culprits. Such problems plagued the hunt for the D.C. sniper John Muhammad and John Lee Malvo, whose initial profile indicated a white male. A different problem plagued the hunt for Aileen Wuornos in Florida's "Highway Killer" case; police initially believed the killer to be male.
Serial killer investigations sometimes reveal an unsatisfactory side to law enforcement — inertia, incompetence, bureaucracy, mismanagement, agency "turf wars," missed opportunities, racial or gender bias, and other failures can slow down the investigation and, indirectly, allow further murders.
While there is a public misconception that serial killers generally want to be discovered, in most instances this is not the case, as serial killers will often go to great lengths to prevent capture or to push police and investigators towards the wrong subjects.
The public's fascination with serial killers led to many successful crime novels and films about fictional serial killers, including Bret Easton Ellis' American Psycho; and especially Thomas Harris' The Silence of the Lambs and its Academy Award-winning movie adaptation, whose main antagonist, the cannibalistic serial killer Hannibal Lecter, is a cultural icon. The character John Doe, from the movie Se7en, is another well-known fictional serial killer.
Murder | Serial killers | Criminology topics
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