An unidentified whistle-blower within the Renault Formula One team gave crucial evidence that there had been a conspiracy for Nelson Piquet to deliberately crash in last year's Singapore Grand Prix, according to transcripts released from the FIA's investigation into the matter.
The details, which reveal the person involved only as Witness X, have bene published as part of the FIA's policy of making its investigations open to public scrutiny.
It appears that Witness X came forward with details when Renault conducted its own investigation in to the allegations. As part of this, it interviewed team members - one of whom confirmed the crash plan, and that team bosses Flavio Briatore and Pat Symonds hd been aware of it.
Witness X stated that Piquet had approached Symonds after qualifying to suggest the idea of a deliberate crash, and that the idea had been worked upon once Symonds mentioned it to Briatore.
The World Motor Sport Council's findings stated: "This version of events was put to Pat Symonds and Flavio Briatore. Mr Symonds did not deny the events. Mr Briatore consistently denied any involvement and did not recall the alleged discussion."