Two commissioners from Madlanga Commission of Inquiry have arrived at the house of slain Witness D in Brakpan on Gautengs East Rand.
Marius van der Merwe, known as Witness D, was assassinated on Friday outside of his home while his wife and kids were in the car.
He testified before the commission last month in connection with his work with the Ekurhuleni Metropolitan Police Department EMPD.