SOUTH AFRICAN DEAF INTERPRETER AT NELSON MANDELA'S MEMORIAL CLAIMS TO HAVE SEEN GHOSTS AT THE MEMORIAL

Jantjie told the AP earlier that he had a history of violence and hallucinated during Mandela's memorial service. Jantjie said he suffers from schizophrenia and told Johannesburg's Star newspaper Thursday that he heard voices during the memorial service.

He has been criticized before by advocates for the deaf for his work interpreting at an event. Francois Deysel, a sign language interpreter with the Deaf Federation of South Africa, said he watched a video of Jantjie signing at the 100th anniversary celebration of the African National Conference in 2012 and concluded, "There was no sign language used. It was only slapping of hands and movement of arms."

The African National Conference said Thursday on its website that it "had not been aware of any of (the) complaints regarding the quality of services, qualification or reported illnesses of Mr. Jantjie."