In 2001, Louis reported Jimmy to BBC over allegations that he slept with a 15-year-old girl. A senior producer decided not to pass on the information to the police.
Not long after Savile died in 2011 at age 84, it was revealed that the legendary broadcaster had sexually abused hundreds of children and women.
Jimmy had reportedly molested victims as young as five at NHS hospitals back when he had unlimited access. His victims amounted to 72 when he was still working at the BBC, according to the Telegraph.
In his 200o documentary, Theroux asked Jimmy about rumors that he was sexually attracted to children. Savile, who was well respected for his charity work, flatly denied the accusations. He had a rather interesting way in denying the allegations too.
"We live in a very funny world. And it's easier for me, as a single man, to say 'I don't like children', because that puts a lot of salacious tabloid people off the hunt," Jimmy said.
"Is that basically so the tabloids don't pursue this whole is he or isn't he a paedophile line?" Louis asked.
"Oh, aye," Savile said. "How do they know whether I am not? How does anybody know whether I am? Nobody knows whether I am or not. I know I'm not… That's my policy and it's worked a dream."
Theroux explained in the new documentary how he wanted to make sense of his own failure to "see him [Savile] for what he really was, to see what clues there were in hindsight."
He said that one of the people who contacted him as soon as the first documentary aired was a 15-year-old woman.
After more than a decade, hundreds more came forward to recount the abuse they had suffered.
"It was upsetting to realise I'd actually met two of the victims while Jimmy Savile was still alive," Theroux said.
"I wondered if I'd handled the encounter differently they might have said more – or if they simply hadn't been ready."
Theroux's new documentary on Jimmy Savile is set to be shown on BBC2 on Sunday.
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