ANSWER
Well it wouldn't have been the first time that security policemen would have been involved in illegal activities, it was about the greater context in which they work.   In other words criminal activities of members in the security police, and especially Vlakplaas, was very often condoned and dealt with in such a manner to prevent them from speaking out against, about the illegal activities
1b	going /...
MR JANSEN	117	D J COETZEE
going on at Vlakplaas.   There was for instance murder cases against two askaris, Bobby Modiba and I can't remember who was the other guy at the moment, which was dealt with in such a way that they got off the hook.   There was cases like, I mean the first priority of us in the security police was security police operations.   I suppose if things got out of hand everyday by the same person they would have decided to make a plan with him and I'm sure, as proved after I left, if you become a security police risk like Brian Nungalungwa(?), he's six feet under after being killed and a policeman being found guilty in a trial of his murder.  The Motherwell Four, three policemen and an askari that was involved in illegal activities with the local security police branch who were blown up in their vehicle.   Major Mos who died of a heart attack,  so-called heart attack but I believe there's now ample evidence that it was not a heart attack but things that were given him by the police.