The man standing in the dock of the Brakpan Magistrates Court on Wednesday did not look like a typical criminal. Matipandile Sotheni, 51, carried himself with the rigid posture and disciplined gaze of a man who had spent decades in the service of the state. But the charges read out against him tell a far darker story: that this former member of the South African Police Service (SAPS) elite Special Task Force (STF) used his lethal training not to protect the law, but to silence those who dared to uphold it.
Sotheni is accused of being the triggerman in the cold-blooded assassination of Marius van der Merwe, a former Ekurhuleni Metro Police Department (EMPD) officer who became a pivotal figure in South Africa’s fight against institutional rot. Known to the public only as "Witness D" during his explosive testimony at the Madlanga Commission of Inquiry, Van der Merwe was gunned down in December 2025, just weeks after he pulled back the curtain on high-level police corruption.
As the court proceedings unfolded on 26 March 2026, the atmosphere was thick with the weight of a justice system under siege. Sotheni, facing charges of murder, attempted murder, conspiracy to commit murder, and the unlawful possession of a firearm and ammunition, took the unusual step of addressing the court directly. With a firm voice that betrayed no hint of nerves, he denied any involvement in the killing that has come to symbolise the mortal danger facing whistleblowers in South Africa.
"I did not kill that man," Sotheni reportedly told the court, according to observers. He maintained that his post-police career had been spent in the private security sector and that he had no connection to the shadowy hit squads that have increasingly plagued the country.
/file/attachments/orphans/matiphandile-sotheni-160326_157769.jpg "Matiphandile Sotheni, the man accused of murdering a witness who testified at the Madlanga Commission of Inquiry, has lashed out in court, strongly denying any involvement in the crime. (Photo: Alpha Ramushwana / EWN)")
The judge, maintaining a stoic expression throughout the outburst, was brief in response. "You can stand down," the judge said, as the matter was postponed once again, leaving the accused visibly angered by the delay in his bail application.
The Man Who Knew Too Much
To understand the gravity of the case against Sotheni, one must first understand the man he is accused of killing. Marius van der Merwe was not just a businessman or a former metro cop; he was a man who had seen the "beast" from the inside and decided he could no longer remain silent.
Van der Merwe’s testimony at the Madlanga Commission—chaired by the retired Constitutional Court Justice Mbuyiseli Madlanga—was nothing short of a grenade thrown into the heart of the SAPS. Under the pseudonym "Witness D," he detailed how senior police officials were allegedly involved in the extrajudicial killing of a robbery suspect. He spoke of "clean-up crews," of evidence being tampered with, and of a culture of impunity that allowed criminals in uniform to operate with the efficiency of a corporate enterprise.
His courage was his death warrant. On a Friday night in early December 2025, the silence of a Brakpan street was shattered by gunfire. Van der Merwe was shot multiple times in what investigators described as a professional hit. He died at the scene, leaving behind a family and a nation wondering if the truth was worth the price of a life.
The Elite Edge
The arrest of Matipandile Sotheni in mid-March 2026 sent a different kind of tremor through the legal fraternity. The Special Task Force is the "best of the best" in South African policing—trained in counter-terrorism, hostage rescue, and high-stakes combat. For one of their former members to be accused of working as a hired gun suggests a terrifying reality: the state’s own training is being turned against its citizens.
Investigators believe Sotheni was not acting alone. The National Prosecuting Authority (NPA) has hinted at a broader conspiracy, though they have been careful not to "meddle" in Sotheni’s legal representation, as a spokesperson recently clarified. The search for the "mastermind"—the person who paid for the hit—remains the most critical part of the ongoing probe.
"The precision of the attack on Mr Van der Merwe suggests a level of training that goes beyond your average street criminal," says a source close to the investigation, who spoke on condition of anonymity. "When you have someone with STF background, you aren't just dealing with a shooter; you're dealing with someone who knows how to track, how to plan, and how to disappear."
A Pattern of Blood
The killing of Witness D is not an isolated incident. It is part of a grim tapestry of violence that has targeted those who speak out against corruption in South Africa. Investigative journalists and civil society groups have pointed to the murder of Mpho Mafole as a direct parallel.
Mafole, the chief auditor of the Ekurhuleni Municipality, was assassinated in June 2025. Much like Van der Merwe, Mafole was a man of integrity who had discovered something he wasn't supposed to see. Just days before his death, he had flagged massive irregularities in a R1.8 billion tender for chemical toilets. He was shot dead near his home in Kempton Park, and while suspects were eventually arrested, the ghost of his murder still haunts the corridors of local government.
The list goes on. The names of Babita Deokaran, the health department official killed in 2021 after blowing the whistle on Tembisa Hospital corruption, and Cloete Murray, the liquidator assassinated in 2023, are frequently cited by activists as evidence that South Africa is becoming a "mafia state."
In each of these cases, the "triggermen" are often caught, but the powerful figures who sign the cheques remain in the shadows. The trial of Matipandile Sotheni is seen by many as a test of whether the justice system can finally break this cycle.
The Defence's Stand
In court, Sotheni’s defence team has painted a picture of a man being scapegoated because of his past. They argue that his background in the Special Task Force makes him an easy target for police looking to "solve" a high-profile case quickly.
"My client is a decorated former officer who has served his country with honour," his lawyer stated during a previous appearance. "The state's case is built on circumstantial evidence and the assumption that because he has the skills to commit such a crime, he must be the one who did it."
However, the prosecution remains confident. They have pointed to forensic evidence and "intelligence-led" leads that they claim link Sotheni directly to the scene of the crime and the conspiracy that preceded it. The charge of unlawful possession of a firearm is particularly significant, as the ballistics of the weapon used in the Van der Merwe hit are a central pillar of the state's case.
A Commission Under Fire
The Madlanga Commission was established to root out the very corruption that Van der Merwe died exposing. Since its inception in September 2025, it has been a lightning rod for controversy. President Cyril Ramaphosa, who recently extended the commission’s mandate until May 2026, has repeatedly condemned the killing of witnesses, calling it a "heinous attack on our democracy."
But for many whistleblowers, words of condemnation are cold comfort. The death of Witness D has had a visible effect on the commission’s proceedings. While some witnesses have been emboldened by his sacrifice, others have retreated into the shadows, fearing that they—or their families—will be next.
The fact that Van der Merwe’s daughter was reportedly present during the attempt on his life adds a layer of cruelty to the crime that the court will have to weigh. The attempted murder charge against Sotheni relates to the danger posed to those who were with Van der Merwe at the time of the shooting.
The Road Ahead
As the case against Matipandile Sotheni moves forward, the eyes of the nation remain fixed on the Brakpan Magistrates Court. This is more than just a murder trial; it is a reckoning for a country that is struggling to protect those who tell the truth.
The transition of elite police officers into the world of private security and, allegedly, contract killing, is a systemic issue that South Africa has yet to fully address. With thousands of highly trained former officers now working in the private sector—often with little oversight—the potential for "guns for hire" is a shadow that hangs over every major corruption investigation.
For now, Matipandile Sotheni remains in custody. His anger in court on Wednesday suggests a man who expects to be elsewhere, but the law has a long memory. As the Madlanga Commission prepares its final report, the testimony of Witness D lives on, recorded in the annals of history, a voice from the grave that continues to demand justice.
The question that remains, however, is whether the arrest of one man—even one as highly trained as Sotheni—will be enough to stop the bleeding. In the streets of Brakpan and the boardrooms of Pretoria, the battle between the whistleblowers and the hitmen is far from over.
Timeline of a Tragedy:
• 30 June 2025: Chief Auditor Mpho Mafole is assassinated in Kempton Park.
• 17 September 2025: The Madlanga Commission of Inquiry begins its hearings.
• November 2025: Marius van der Merwe testifies as "Witness D."
• 5 December 2025: Marius van der Merwe is shot dead in Brakpan.
• 15 March 2026: Matipandile Sotheni is arrested by a multi-disciplinary task team.
• 26 March 2026: Sotheni denies all charges in the Brakpan Magistrates Court.
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