CLIVE MAHLAULI MAKHUBU
Firstly, the concern was based on his disappearance, stemming from the fact that he was a cell member and knowing the cell's regulations that you don't disappear for no apparent reason because you are working together with other people who have weapons as well.  In other words if you are not present and we don't know as to where you are you pose a problem to us.  And the security was of vast importance, therefore your disappearance becomes a concern to us.