Police say the task team established to investigate cases emanating from the Madlanga Commission of Inquiry have registered their first breakthrough in the murder investigation of Marius Van Der Merwe, also known as Witness D in the Madlanga Commission of Inquiry. Police say the suspect believed to be the gunman was arrested in Johannesburg on Saturday. Investigators have also seized a vehicle believed to have been used during the murder. The suspect is expected to appear before the Brakpan Magistrates Court on Monday. Bongiwe Zwane spoke to National police spokesperson Brigadier Athlenda Mathe