Canada's Richard Pound has questioned the intentions of two International Olympic Committee (IOC) investigations into Russian doping amid another fierce attack on their "outrageous" decisions over recent months.
Pound has already expressed doubt that next month's IOC-led Olympic Summit in Lausanne will be able to address problems linked to anti-doping.
He has now claimed the IOC have "dug themselves into a hole" by refusing to give Russia a blanket ban from the Olympic Games in Rio de Janeiro last month following allegations of state-sponsored doping - but not yet stopped digging.
In particular, the founding World Anti-Doping Agency (WADA) President has criticised the decision not to permit whistleblower Yuliya Stepanova from appearing at Rio 2016 due to her supposedly not satisfying "ethical requirements".
"This was outrageous," Pound told insidethegames.
"It has done more to discourage whistleblowers from coming forward than anything else I can imagine.
"It was incomprehensible - there was no ethical issue at all."
Stepanova served a two-year doping ban before coming forward, but her presence at Rio 2016 had been billed as a key way to reward whistleblowers and encourage others to come forward.
Pound, the senior IOC member and former vice-president who chaired last year's WADA Independent Commission into Russian doping in athletics, also criticised the IOC refusal to fully ban Russians from Rio 2016.
The IOC rejected WADA's proposal for such a "nuclear option" and instead handed responsibility to International Federations to make decisions about their specific sport.
"They made a decision too quickly," Pound said.
"When you dig yourself into a hole you should stop digging - and they haven’t done that.
"They should have suspended Russia and said individuals can compete under the IOC flag if they can prove they are clean."
A second WADA-commissioned investigation spearheaded by Pound's compatriot Richard McLaren is still continuing ahead of full details expected before the end of the year.
But the IOC are also undertaking two investigations of their own, which could draw different conclusions to those of McLaren.
One is being led by French judge and IOC Ethics Commission vice-chair Guy Canivet and the other by Swiss IOC member Denis Oswald.
Canivet is set to focus on the allegations of Government involvement in Russian doping during the 2014 Winter Olympic Games in Sochi.
Oswald will look more specifically on the claims that samples submitted by home athletes during the Games were illegally replaced with fake ones.
Both have vowed to work with McLaren as well as with a Russian inquiry headed by IOC honorary member Vitaly Smirnov, a former Sports Minister in the Soviet Union.
But they plan to take "all appropriate measures and sanctions" according to the findings of these Commissions, rather than that of McLaren.
Pound, unsurprisingly, is not convinced.
"I am not sure what they have in mind and I am not quite sure of the purpose," he told insidethegames.
"Yes, you need Disciplinary Commissions to look at the evidence [provided by McLaren].
"But to reinvent the wheel, and to get a lot of cooperation from Russia while doing it?
"That seems a little unusual."
Tensions between IOC and WADA officials continue to intensify ahead of the Olympic Summit on October 8.
Led by Bach, the IOC has fiercely criticised WADA for not investigating Russian doping problems sooner.
IOC Executive Board member Sergey Bubka also told insidethegames that WADA's policies and governance "must be changed" in order to increase efficiency.
Pound and others in WADA have, in turn, claimed the IOC are seeking to shift the blame onto someone else in order to detract from their own wrongdoing.
The Canadian did not vote against Bach during a measure of confidence at last month's IOC Session, however, during which Britain's WADA Foundation Board member Adam Pengilly was the only member to vote in opposition.
Pound clashed with both Bubka and Oswald in 2005 when he was WADA President and they were respective heads of the IOC Athletes' Commission and the Association of Summer Olympic International Federations.
A letter co-signed by the Ukrainian and the Swiss protested in the "strongest possible terms" against alleged irregularities committed in the "so called doping revelations" propagated by WADA against American cyclist Lance Armstrong.
Pound rejected all of their criticisms and was proved right eight years later when Armstrong admitted to doping throughout his seven Tour de France victories.
insidethegames has contacted the IOC for a reaction to these comments.