The unit had in fact become a "parallel" intelligence and security wing for Zuma and his loyalists, he said.
"The structure duplicated functions that were part of other units within SSA or other stakeholder departments - for instance technical surveillance counter measures (TSCM), which was brought together under the command of Mr Dlomo, although the function actually resorted with another SSA structure," said Mr Y.
"The unit took over functions relating to other government departments.
"One would be [the] South African Military Health Service. The police service ... is the only department with the mandate to do physical protection, but special ops members were trained as VIP protectors. In the air force, special operations unit members were designated to guard former president Zuma's airplane.
"All of these were functions that were duplicated on behalf of other departments."
Mr Y said the fact that the likes of Myeni also received protection from the unit - despite not meeting the requirement - was proof that the unit had become embedded in a faction of the governing party, led by its president.
"We have found no paperwork that indicates a request or instruction from the agency [relating to the protection extended to Myeni]. Any request highlighting that Ms Myeni thought her life was in danger could have been channelled to the SA Police Service. The SSA's mandate is in the area of counter-intelligence."