The accuser in the Christian Horner controversy has filed an official complaint regarding his conduct with Formula 1's governing body, the FIA.
According to the BBC, the complainant, identified as a woman, has accused Red Bull's team principal of inappropriate behaviour and has submitted a grievance to the FIA's ethics committee.
Horner, aged 50, has consistently refuted the allegations made against him.
The woman's actions come after two previous whistle blower complaints were lodged with the FIA in recent weeks.
A complaint was lodged with the FIA ethics and compliance hotline on February 2, specifically addressing Horner's conduct towards a female employee.
The complainant urged the FIA to investigate and expressed concern that Red Bull might attempt to conceal the matter.
A second complaint was lodged on March 6, referencing the initial complaint and warning that the whistle blower would escalate the issue to the media.
The woman filed an official complaint with the FIA following her appeal against Red Bull's dismissal of her initial complaint.
She intends to request Red Bull to reconsider its decision, which followed an investigation conducted by a lawyer.
Last week, Red Bull suspended her from her position within the team. The allegations against Horner emerged in early February, although the investigation into his conduct had commenced nearly a month earlier. According to Red Bull, the investigation lasted for 10 weeks.
Red Bull engaged an external lawyer to probe the accusations. Upon submission of his report to the company's board, the decision was made to dismiss the complaint.
The subsequent day, a collection of messages purportedly involving Horner was leaked to nearly 150 senior F1 insiders and media outlets.
Horner has expressed the need to "draw a line under" the controversy. "The reality is that there was a grievance raised, it was dealt with in the most professional manner by the group, that appointed an independent KC, one of the most reputable in the land.
"He took time to investigate all the facts. He looked at everything and he came to a conclusion where he dismissed the grievance.
"As far as I'm concerned, as far as Red Bull is concerned, we move on."
The controversy is at the centre of a power struggle inside Red Bull, involving Horner, the motorsport adviser Helmut Marko, the team's three-time world champion Max Verstappen and his father Jos, Verstappen's manager Raymond Vermeulen and the two owners of the company.
Last weekend, an intervention by Max Verstappen was instrumental in keeping Marko from being dismissed.
Chalerm Yoovidhya, the 51% shareholder, has backed Horner and forced 49% of shareholders of Red Bull Gmbh in Austria to back down in wanting to force him out.
