29/09/2026
SOUTH AFRICA’S SERIAL KILLERS: THE DECEPTION, THE BRUTALITY AND THE HUNT FOR ANSWERS
Behind the notorious names are victims, calculated betrayals and investigations that demand evidence. DEA-SCU Director-General Marius Cloete says an offender’s suffering can never justify the suffering they inflict.
The promise of a job. An encounter with someone who appears harmless. A disappearance that becomes a murder investigation.
In documented South African cases, serial violence has begun with encounters that gave victims little reason to anticipate what would follow. The danger was concealed behind an ordinary conversation, an offer of help, or a familiar face.
The investigative challenge begins when detectives confront a disturbing possibility: separate deaths may be the work of one offender.
Who connects the victims? What evidence links the scenes? And could someone else already be at risk?
South Africa’s serial-murder cases offer difficult answers. They also expose the danger of believing that every killer follows the same pattern.
Moses Sithole exploited the search for employment. Reporting on his crimes describes how he approached women with promises of jobs, using their hopes of earning a living to gain their trust. In 1997, he was convicted of 38 murders and 40 rapes.
The significance goes beyond the scale of those convictions. His deception turned a legitimate need into an opportunity for violence. The women’s decision to seek work was never the cause of their deaths. Responsibility belonged to the man who deliberately exploited it.
That distinction matters when examining how serial offenders operate. Investigators study victims’ circumstances to understand how an offender reached them—not to assign blame to the people attacked.
The Port Elizabeth case of Stewart Wilken, known as “Boetie Boer”, presents a different picture.
Wilken committed murders during the 1990s and was convicted of seven murders in 1998. His victims included adults and children, challenging the assumption that a serial killer will always select one narrowly defined type of person.
Years later, investigative psychologist Dr Gérard Labuschagne sat down with Wilken in prison. The 2006 interview sought to explore his background, thinking and explanations after conviction.
In a published interview about that encounter, Labuschagne described reviewing case material, including statements about Wilken’s upbringing. He acknowledged evidence of a terrible childhood while making an essential observation: other people endure comparable suffering without going on to hurt others. He also described substantial variation in Wilken’s victims and behaviour.
The lesson is uncomfortable but necessary: a killer’s explanation is material to examine, not a verdict to accept.
An offender may describe anger, rejection, abuse or a supposed grievance. Investigators still have to establish what happened, whom the offender harmed, and what evidence supports each claim.
The case of Brian Mudyiwayana brings the question of accountability into particularly sharp focus.
In March 2022, the National Prosecuting Authority announced that he had received six life sentences and an additional 17 years. His murder victims were Moleboheng Mafata, Gladys Ntondini, Grace Nyasha Hondo, Naume Gwengwe, Lungelwa Dangatye and Michael Pekaan.
According to the NPA’s account of sentencing evidence, investigative specialist Lieutenant Colonel Elamrie Myburgh assessed him as motivated by power, control and excitement. Her report described manipulation, a lack of empathy and attempts to blame his actions on “muti”. Those were findings concerning this offender, not a diagnosis of every serial killer.
Taken together, these cases reveal different forms of exploitation and different explanations offered afterwards. They do not establish one universal method.
Some offenders plan encounters. Others exploit opportunities. Some attack strangers; others kill people they know. A repeated method can help investigators identify connections, but detectives cannot assume every offence will look identical.
Nor is a “signature” necessarily a deliberate mark left for police. Investigators distinguish the practical actions used to commit a crime from behaviour expressing an offender’s psychological needs. Changes in circumstances can alter what happens at a scene. An unusual injury, by itself, cannot prove a motive or connect two murders.
This is where painstaking investigation becomes decisive.
Detectives must reconstruct victims’ last known movements, compare accounts and examine forensic findings. Information held in separate case files must be brought together and assessed. Similarities can generate leads; they must then be tested. Behavioral profiling supports that process, but it cannot replace a thorough investigation.
For Marius Cloete, Director-General of the Drug Enforcement Agency – Street Crimes Unit, the brutality demands an uncompromising response centered on victims and accountability.
Cloete’s stated position is that becoming a serial killer involves choices. He rejects any suggestion that childhood trauma gives an offender the right to take lives or transfer their suffering onto innocent people.
Reflecting on his SAPS career, Cloete says he served in a rapid-reaction unit and spent time alongside organized-crime investigators, including around investigations involving Wilken. He recalls the persistence and coordination required to trace dangerous suspects through work that could take months or years.
His argument is moral and practical: the offender’s history must never push the victim out of the story.
Research adds necessary complexity. An FBI multidisciplinary review identified interacting biological, psychological, and social influences, together with personal decisions. It found no single cause of serial murder. Understanding those influences may help explain an offender’s development; it does not make childhood adversity a prediction of future murder.
The public also needs a more reliable warning system than appearance or reputation. Some documented serial killers maintained families, employment and community connections. Equally, being withdrawn, unusual or mentally unwell is not evidence that someone is a killer.
DEA-SCU, an independent non-profit organisation and not a police service, urges people to report concrete concerns to SAPS: threats, stalking, witnessed violence or information about a disappearance. Dates, locations, messages and accurate descriptions can help investigators assess a report.
Suspicion should lead to responsible reporting, never confrontation or public accusations unsupported by evidence.
The lasting measure of these cases is the human loss. Every murder count represents a person whose future was taken away. Every successful investigation carries an obligation to establish the truth and protect those who may still be in danger.
Stay alert. Report responsibly. Keep the victims at the centre of the story.
