Johannesburg - The wife of murdered top cop Major General Tirhani Maswanganyi was killed in a car crash on Monday morning, Gauteng police said. Spokesperson Lieutenant Colonel Katlego Mogale confirmed Shareen Maswanganyi was killed in the accident, which happened on the R101 in Pretoria."I can confirm that the person involved in the accident was the wife to the late Major General Maswanganyi," she said."The cause of the accident is unknown and under investigation."Police did not confirm reports that she was on her way to his murder trial in the High Court in Pretoria where the matter was postponed on Monday morning to September 6. Shareen was the only person killed in the accident, with her sister and two children also in the vehicle at the time.It is believed the accident happened around 08:30, Mogale said.Maswanganyi's body was found on June 17, 2013, in a field near Hammanskraal, north of Pretoria, with his hands and feet bound. A police patrol first found his Isuzu bakkie abandoned next to the R101. A police uniform and a police identification card were in the car.Maswanganyi was the police's Johannesburg cluster commander.Top cop’s murderIn May last year, Siphiwe Petros Madakane, 33 at the time, pleaded guilty in the Pretoria North Magistrate's Court to the murder of Maswanganyi, the National Prosecuting Authority said.Sphiwe Petros Madakane, was sentenced to 20 years' imprisonment, five of which were suspended, spokesperson Nathi Mncube said at the time.Madakane and his co-accused, a 52-year-old warrant officer from the Vaal, were arrested on January 9 last year for allegedly plotting to kill investigators probing Maswanganyi's murder.Madakane had not only been implicated in the alleged plot to kill investigators, but was also linked to Maswanganyi's murder.Ndaedzo Vele, Tshepo Mosai and Simon Msibi still face charges for allegedly killing Maswanganyi.