ANSWER
No, Mr Mamasela was actually an awaiting trial prisoner in Krugersdorp prison when Major Kruger of West Rand Security went there as a result of an incident in jail.  He was then still in South Africa as a member of student organisations in Soweto.   He then approached Mr Kruger and said that he is part of this student organisation and he can be of a great help.   He was there awaiting trial on robbery.   Major Kruger then checked his background, later
3a	involved /...
MEMBER OF COMMISSION	258	D J COETZEE
involved Captain Jan Coetzee as an additional handler, and in August 1979 Joe Mamasela was released and then started with the South African Security Police.   He only thereafter infiltrated the ANC in Botswana and when he was caught out by them he then worked with Jan Coetzee, I don't know for how long and exactly when he was called out, but he permanently came to Vlakplaas in February 1982.   That is how he became an askari.