Zak Brown has put pressure on both the FIA and Formula 1 to demand further information from Red Bull over its report following the investigation into Christian Horner.
Horner was cleared of inappropriate behaviour by Red Bull GmbH on Wednesday on the eve of the new season after denying all allegations made against him by a female member of staff at the team.
Mercedes' Toto Wolff slated the report as "basic, vague and opaque". Neither the FIA nor F1 has since commented following the statement from the parent company, with the report to remain confidential to protect all parties involved.
When asked about the case during pre-season testing, Brown made it clear that he expected transparency to be at the heart of the report, which some felt was lacking as no details about as to what occurred were revealed.
Following the statement, Brown was asked for a response, which he gave before an anonymous source sent an email to members of the F1 paddock allegedly containing evidence from Horner's case.
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"I read the statement and from what I have seen, there continues to be a lot of rumours and speculation," Brown told media including RacingNews365.
"I think the sanctioning body has a responsibility and authority to the sport and the fans - we are all ambassadors for Formula 1 - and so I think they need to make sure things have been fully transparent with them.
"I don't know what those conversations are, but it needs to be fully transparent and they need to come to the same conclusion that has been given by Red Bull and that they agree with the outcome.
"But until then, there will continue to be speculation because there are a lot of unanswered questions about the whole process.
"That is what is needed by those that run the sport to really be able to draw a line under it and until then, there will continue to be some speculation by people - and I don't think that's healthy for the sport.
"It is the responsibility, ultimately, of the organisers and owners of Formula 1 to make sure that all the racing teams and personnel and the drivers and everyone involved in the sport are operating in a manner which we all want to live by.
"I don't think it is the teams roles and responsibilities. It is up to the FIA and Formula 1 to ultimately decide and ask what they feel gives them the level of transparency that they need to ultimately come to their conclusion.
"We just need to count on them that they fulfil that obligation to all of us.
"It needs to be dealt with by the regulator, they are the ones that have the authority and responsibility to do so."
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