Brazilian police have recommended 10 people be charged in a ticket-touting ring uncovered at the Rio Games, including the man who until recently was Europe's top Olympic official.
They also say they hope International Olympic Committee head Thomas Bach will provide witness testimony in the case, although they add he is not a suspect.
"If Bach were to return to Brazil we would certainly like to hear from him," Inspector Ronaldo Oliveira told reporters on Thursday.
He said some of those charged had asked Bach directly for more tickets and he had apparently provided them.
"Is it Bach's job to deal with these tickets? That is something we would like to know," Oliveira said.
Bach failed to return to Brazil for Wednesday's opening of the Paralympics, instead attending a friend's funeral in Germany. The International Paralympic Committee says he won't return for any of the events.
Among those against whom police are seeking charges are Patrick Hickey, former head of the Olympic Council of Ireland, Martin Burke, the Irish council's sports director and Kevin Mallon, a director of international sports hospitality company THG Sports.
Police said they are seeking charges against seven others: four other THG officials and three from Dublin-based PRO10 Sports Management, Ireland's official Olympic Games ticket reseller.
If found guilty, they could face two to five years jail.
Under Brazilian law, only prosecutors can file charges and can take up to a month to decide whether to.
Rio police have accused Hickey, 71, of operating the scalping operation with PRO10.
They say PRO10 funneled tickets to THG Sports, which sold them illegally at inflated prices. All involved have denied wrongdoing.
Authorities believe the ring operated for about eight years and was preparing for other Olympic events such as the 2020 Tokyo Games.
The ring is said to have operated similar scams at the Sochi 2014 Winter Olympics and the 2012 London Games.
