Correctional Services spokesman Manelisi Wolela has denied allegations that student leader Mcebo Dla.
Four of the Jeppestown massacre accused claim they had gone to the house to see a witchdoctor because they needed muti to cleanse themselves.
Thirteen people allegedly robbed a Pick 'n Pay supermarket in Honeydew before engaging in a gun battle with police in Jeppestown. Four police and eight robbers died in the shootout.
Sihle Mdunge, 27, and Muzulelwa Vezi, 30, took the witness stand at the Johannesburg high court and denied being involved, claiming they had gone to the house to consult a traditional healer known as Gogo.
Mdunge and Vezi were both linked to the crime by their fingerprints, which were found on cars parked at the scene and identified as the getaway vehicles from the robbery earlier that day.
Two other accused claim the same alibi, but Zinto Mqunu, 29, and Bekokwakhe Zulu, 30, will not testify. The trial continues.