The son of Lord Janner - the Labour peer falsely accused of being in a murderous paedophile ring - has accused police investigating the case of "losing all rationale".
The £2 million probe into allegations of sexual abuse and murder at the hands of public figures in the 1970s and 80s ended without a single arrest.
It emerged that 51-year-old Carl Beech, a former children's nurse and NSPCC volunteer, had invented the whole thing and was himself, a paedophile.
Daniel Janner QC said police had been whipped up into a "post-Jimmy Savile frenzy", and called for the officers involved in the case to be subjected to an inquiry.
"The police lost all sense of rationale here," he told talkRADIO's Julia Hartley-Brewer. "They simply went on the basis of all victims, not complainants, are to be believed."
He continued: "If you work from that premise, even the most mad, insane allegations are treated seriously.
"In my father's case he was accused of raping and torturing Carl Beech in the Carlton Club where senior Conservatives hang out. He was a Labour MP."
Beech has been found guilty of 12 counts of perverting the course of justice, and one count of fraud, relating to a £22,000 criminal injuries pay-out he falsely claimed for being raped by Savile.
"There are no winners in this," Mr Janner added. "We as a family were horrified, and we remain horrified. It has been torture for us."
Mr Janner is now calling for those accused of sexual abuse to remain anonymous until charged, as his father died in January 2015 before his name was cleared.
"Inspector Clouseau looking at this would realise it was absolute fantasy and rubbish," he said.