CAPE TOWN - Paul O'Sullivan's time before the Ad Hoc Committee has gotten off to a rocky start over sections of his past he deems off-limits.
O'Sullivan says he will not respond to questions that endanger his safety.
But committee chairperson, Soviet Lekganyane, insists he cannot limit MPs' questioning.
“So any allegations that have been made or any information that members of the committee want to probe with you, they are going to do so,” Lekganyane told O'Sullivan.
“Let me remind you that you are under oath; let's cooperate.”
However, O'Sullivan saw things differently from the presiding officer.
“For the record, the oath I took was to tell the truth, the whole truth and nothing but the truth. I did not take an oath to answer every single question if it is going to violate my personal information and my family's security," O'Sullivan responded.
LIVESTREAM | Paul O'Sullivan testifies before SAPS Ad Hoc Committee
O'Sullivan says repeated threats to his life force him to withhold personal details.
The controversial forensic investigator's testimony is ongoing at the SAPS Ad Hoc Committee.
He's come from London after weeks of delays.
O'Sullivan wanted to testify virtually, citing fears for his safety.
Serious allegations have been made about him at the inquiry, including that he interfered in police operations.