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Critical Essay Sample: Serial Killers

Critical essay


According to (2019) and Hernandez et al. (2015), the distinctive feature of serial killers is the "cooling-off period." In this regard, a serial killer is an individual who kills three or more people, typically to meet an abnormal psychological gratification. Most importantly, the murders are carried out within a timeframe of more than a month (Hernandez et al., 2015). Hernandez et al. argue that the difference between a serial killer and a spree killer is that the latter does not need a cooling-off period and, therefore, commits different murders at different times - the definition of mass murders focuses on one incident, with little distinction of time between the killings.

Typically, the motivation for serial killers is psychological gratification. Several examples of serial killings have also revealed that most of the killers have sexual contact with the victims. However, the UK law enforcement provides a broad range of motivations of serial killers, including anger, financial gain, attention-seeking, and thrill-seeking. Additionally, the victims might have some aspects or attributes in common such as appearance, race, gender, and demographic profile; therefore, although there are conceptual overlaps, a serial killer is neither a spree killer nor a mass murderer (Harrison et al., 2019).

This paper seeks to evaluate the understanding of serial killers by evaluating the definition of this concept at a legal and social level. In this case, the aim is to establish the difference between serial killers and ordinary homicides by evaluating the psychological, social, and criminal processes that define and address the issue of serial killers. In many ways, the legal definition of serial killing sets the stage for its perception in a social context; however, there is a need to evaluate serial killers from a socio-psychological angel to gain a better understanding of their drive, motivation, and behavioural constructs.

Background Analysis

An analysis of the data on the serial killers in the UK reveals that most serial killers, around 31.8 per cent of the reviewed cases, kill for enjoyment; other reasons include financial gain (30.1 per cent), anger (18.1 per cent), gang activity (6.3 per cent), and other reasons (9.8 per cent) (, 2019;, 2019; Murphy, 2018). The data indicate that the motivations behind serial killers are significantly varied, which highlights the influence of the sociocultural and background environment in which they exist and even carry out their killings. Through popular media, serial killers are portrayed to sue repulsive techniques to kill their victims, while the statistics also indicate that most of them choose the easiest ways to kill. In this regard, most of the serial killers (43 per cent) killed their victims by shooting; others include strangling (21.7 per cent), stabbing (14.8 per cent), burgeoning (9.2 per cent), poisoning (7.2 per cent), and axing (1.5 per cent) (, 2019;, 2019; Murphy, 2018). Other methods also used include burning, drowning, overdosing, running over, and smothering victims.

Studies show that the method used by a serial killer to murder their victim has a strong correlation with their scores on IQ tests, which means that smarter serial killers choose methods that are hard for law enforcement to track, gather evidence, and investigate (, 2019;, 2019; Murphy, 2018). For example, most of the smartest serial killers arrested used bombs, followed by poisoning, strangling, stabbing, shooting, and bludgeoning. The statistics reveal that serial killers' mental ability varies from smart geniuses to the dumb and/or mentally ill folks.

Available literature also focuses on evaluating the victims and the criteria serial killers use in choosing them. In terms of gender, analyses reveal a slight lean toward women – male serial killer victims constitute 48.6 per cent, while female serial killer victims stand at 51.4 per cent (, 2019;, 2019; Murphy, 2018). Statistically, the data show that victims are equally split on gender; according to race, two third of serial killer victims are white.

Psychology of Serial Killers vs. Ordinary Homicides

In evaluating the psychology of serial killers, the notable aspect is psychopathy and the lack of empathy, meaning that most serial killers cannot express or understand the typical human feelings such as empathy (Pozzulo et al., 2015). However, studies reveal that psychopathy and the lack of emotions can be traced back to infancy and childhood development periods, raising the age-old question – are criminals genetically born or nurtured by the environment? This question has not been authoritatively answered through research.

However, other studies indicate that similarities in tendencies of would-be serial killers can be established as early as their infancy (Hernandez et al., 2015; Pozzulo et al., 2015; Harrison et al., 2019). Typically, among these trends is the relationship with their mothers. Their development is shaped in a way that they end up hating women; in most cases, the mothers are overprotective, controlling, as well as emotionally and physically abusive. Statistics indicate that 66 per cent of serial killers are raised in an environment where the mother is the dominant figure. Serial killers may exhibit different degrees of psychopathy or mental illness, which is attributed to their homicidal behaviour; for example, mentally ill individuals might experience psychotic breaks. This leads them to believe that they are a different person and thus compelled to murder different people. The display of psychopathy and blunted emotions means that serial killers have difficulties in following rules established by the moral standards and norms in society (Blair et al., 2005).

Even though most of them understand the rules, they typically find it difficult to follow them because they do not agree with their psychological construct. They also display a lack of guilt, remorse, and impulsivity and have a strong need to control and predatory behaviour. Psychopaths can present standard behavioural constructs to the rest of the society; in fact, some of them can be regarded as charming (Blair et al., 2005). This is significantly different form individuals with mental disorders such as schizophrenia.

Moreover, serial killers display an elevated likelihood of engaging in necrophilia partialism and fetishism; in this case, the level of fantasy that they express and the increasing blurring between reality and their imagination leads them to carry out acts such as sexual contact or achieve psychological gratification from killing targeted people (Campobasso et al., 2009). Some of the serial killers were involved with other petty crimes such as vandalism, fraud, and theft, resulting in many of them finding it hard to maintain their jobs and tend to work in manual employment.

The Operation of a Serial Killer

Studies have sought to establish the gender difference in serial killers. In this regard, much of the literature indicates that there are considerable differences between a male and female serial killer - the difference can be established through their typical portrayals (Large et al., 2008). The male serial killer is portrayed as a loner who stalks people, snatches, tortures, and sexually abuses before killing them, and most of them have scary nicknames such as “BTK – Bind, Torture, Kill” and “Jack the Ripper.” Although this description does not fit all serial killers, it provides an underlying understanding that male serial killers are more daring in their pursuit of their victims; statistics also support this stereotype when it comes to male serial killers (Fox et al., 2016).

Female serial killers are portrayed like Beverly Gail Allitt, who was convicted of murdering four children, attempting to kill three kids, and causing bodily harm to another six children; she committed these crimes over a period of 59 days. In the period when she committed these killings, she was enrolled as a state nurse, and to kill her victims, she administered lethal doses of insulin to at least two of her victims. In the body of another victim, a large air bubble was found. Investigations by the police between February and April 1991were unable to establish the nature of the three attacks that led to the deaths of these boys; this approach adopted by Allitt is used as the typical portrayal of a female serial killer – they are less bold, tend to target and kill acquaintances and people who surround them (Silvio et al., 2006); these women are also described as well-educated and caregivers.

This highlights that male and female serial killers kill differently and use a different approach to identifying and murdering their targets in society. While male serial killers are regarded as bold hunters who enjoy the thrill of stalking, torturing, and killing, women prefer the subtle approaches such as poison and the "familiar and safe" environment within their workplace and among the people who live with them (Miller, 2014a).

The media play a crucial role in the understanding and stereotyping of serial killers; for example, the coverage of homicides, including killing sprees, mass murders, and serial killings, is done according to strict definitions that distinguish serial killers from other homicides. However, the influence of the media also establishes a strong bias in the community, and consequently, law enforcement does not consider other aspects of serial killings (Miller, 2014b). For example, instances of random killings or selecting victims from a particular walk of life. Additionally, the coverage on the media of serial murders, especially the popular television shows and films, reaches a level of romanticising these killers; as a result, this creates an allure for many inactive serial killers to be triggered into killing (Blair et al., 2005). At the same time, the portrayal of serial killers in the media has transformed it from “something that a person did” to “something an individual can become” - this distinction is increasingly disrupting the traditional views of a serial killer.

Investigation Process

The first step in investigating a serial killer is identifying a pattern of murders fitting the known structure of serial killing; in this case, using forensic and behavioural evidence plays a crucial role in linking the targeted killings, and thus establishing them as part of serial murders (Blair et al., 2005). The identification process focuses on developing the link between the victims, establishes a pattern and a profile of both the victims and the suspects. Identifying murders as serial killings is a crucial step in the investigation; it also sets the stage for profiling potential perpetrators and proceeding with the forensic evidence such as DNA or fingerprints to tie suspects to the murders.

Criminal defences of serial killers typically focus on their mental state; the underlying issue in these arguments is that if the psychopathy and emotional bluntness they face are a result of childhood trauma, do they bear the responsibility of their actions? This is especially the case if they are mentally ill; therefore, pleas of insanity or other mental illnesses are common in their criminal defences (Palermo and Knudten, 1994). In the UK, murders including serial killings receive a lifetime prison sentence - this means that the murderers will remain in prison until their lives end. Currently, there is no specific guidance regarding the sentencing of serial killers specifically.


  1. There is a need to raise awareness regarding the impact of early childhood trauma or difficulties at the infancy level. This will help prevent the psychological challenges that might push young children to social isolation and psychopathy.
  2. There is a need to cover serial killers in popular media responsibly. This is especially the case in romanticising these killers to a point where some members of the society are attracted to these characters.


According to this study, the primary difference between serial killers and ordinary murders is that most of the serial killers are significantly driven by a combination of their overarching psychological status, their developmental history, and impulsivity to commit murders; additionally, most of them draw psychological gratification from such killings. Ordinary homicides, even those that occur outside legal justification, lack the consistency of serial killings. For example, vehicular homicide and vehicular murder are different from serial killing because they lack the distinct features – three or more murders and a cooling-off period. Additionally, serial killing is different from mass murders because the latter are carried out at one place and a single given period; therefore, the psychology of a serial killer is hard-wired towards killing for psychological gratification among other motivating factors. The psychology of ordinary murders is driven by circumstance and emotion of the moment; additionally, ordinary murderers are less likely to continue killing, unlike serial killers.




Blair, J., Mitchell, D. and Blair, K., 2005. The psychopath: Emotion and the brain. Blackwell Publishing.

Campobasso, C.P., Colonna, M.F., Carabellese, F., Grattagliano, I., Candelli, C., Morton, R.J. and Catanesi, R., 2009. A serial killer of elderly women: Analysis of a multi-victim homicide investigation. Forensic science international185(1-3), pp.e7-e11. (2019). The social study of serial killers | Centre for Crime and Justice Studies. [Online] Available at: [Accessed 30 Mar. 2019].

Fox, J.M., Brook, M., Stratton, J. and Hanlon, R.E., 2016. Neuropsychological profiles and descriptive classifications of mass murderers. Aggression and violent behaviour30, pp.94-104.

Harrison, M.A., Hughes, S.M. and Gott, A.J., 2019. Sex differences in serial killers. Evolutionary Behavioural Sciences.

Hernandez, J., Highsmith, J., Madrigal, S. and Mercado, M., 2015. Nature (MAOA) and Nurture in a Criminal. UC Merced Undergraduate Research Journal8(1).

Large, M., Smith, G., Swinson, N., Shaw, J. and Nielssen, O., 2008. Homicide due to mental disorder in England and Wales over 50 years. The British journal of psychiatry193(2), pp.130-133.

Miller, L., 2014a. Serial killers: II. Development, dynamics, and forensics. Aggression and violent behaviour19(1), pp.12-22.

Miller, L., 2014b. Serial killers: I. Subtypes, patterns, and motives. Aggression and Violent Behaviour19(1), pp.1-11.

Murphy, J. (2018). Why was there a spike in serial killers? [Online] Available at: [Accessed 30 Mar. 2019]. (2019). Homicide - Office for National Statistics. [Online] Available at: [Accessed 30 Mar. 2019].

Palermo, G.B. and Knudten, R.D., 1994. The insanity plea in the case of a serial killer. International Journal of Offender Therapy and Comparative Criminology38(1), pp.3-16.

Pozzulo, J., Forth, A.E. and Bennell, C., 2015. Forensic psychology. Pearson Prentice Hall.

Reed, A., 2019. Female Serial Killers: Establishing a More Accurate Profile Based on Empirical Evidence (Doctoral dissertation, The Chicago School of Professional Psychology).

Silvio, H., McCloskey, K. and Ramos-Grenier, J., 2006. Theoretical consideration of female sexual predator serial killers in the United States. Journal of Criminal Justice34(3), pp.251-259.

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