Race-fixing allegations have put Formula One's credibility at stake and the governing body must take a firm stance, according to Williams co-owner Patrick Head.
Brazilian driver Nelson Piquet has alleged that his former Renault team ordered him to crash in Singapore last September to bring out the safety car and help Spanish team mate Fernando Alonso win the race.
Former champions Renault have been summoned by the sport's governing body to a hearing in Paris on September the 21st to answer charges of fixing the race and fraudulent conduct.
They in turn have commenced criminal proceedings against Piquet and his father, accusing them of false allegations and attempted blackmail.
Piquet, 24, was dropped by the team last month after failing to score a point in 10 races.
He says he has told the governing body the truth.