ROMEO MBUSO MBAMBO
I think Brigadier Msemela did that, who was in charge and superior to Sergeant Khumalo and after having worked under him for a very long time he could have easily done that even though he may not have been killed by Brigadier Msemela.  That was a way of showing, a way of acknowledgement for Sergeant Khumalo as a police that was working under him but what he did considering that was himself who killed Sergeant Khumalo, he was trying to cover up and shame the Khumalo family.