the US Grand Prix. At the end of the season, the team had accumulated sixteen points, an improvement on the previous season, but still only 8th in the constructors' championship, ahead of the struggling Jordan Grand Prix team and Minardi. 2004 Toyota retained their driver line-up for , but the season proved difficult. Both Toyotas (together with Williams cars) were disqualified from the Canadian Grand Prix for running illegal parts. Cristiano da Matta, following disappointing performances, left the team after the German Grand Prix and was replaced by fellow Brazilian Ricardo Zonta, who had been the team's third driver. Zonta drove for Toyota for the subsequent four rounds, before being replaced by Italian Jarno Trulli, who had left the Renault works team. Panis, meanwhile, announced his retirement from racing, and bowed out before the final race of the season in Brazil to allow Zonta, who had stepped aside for Trulli, to compete in his home race. Neither Trulli nor Zonta scored points for the team in those late season races, although Trulli qualified well in both Grands Prix he took part in. Toyota brought in ex-Jordan and Renault designer Mike Gascoyne early in the year to oversee the development of the car, which improved during the year. The team scored just over half the points they scored in 2003, but equalled their best finish of fifth at the United States Grand Prix with Panis and maintained their 8th place in the constructors' championship. Industrial espionage 2004 also saw Toyota being accused of industrial espionage in the case of stolen data files from Ferrari. This following a season where many Formula One fans commented on similarities of the Toyota TF104 to the Ferrari F2003-GA. The district attorney of Cologne, where Toyota F1 is based, led the investigation saying "It's an immense amount of material. We’d need over 10 thousand pages to print everything," in relation to the number of documents generated in the design of any modern F1 car. Toyota refused to send the data back to Italy because they did not want Ferrari to take advantage of their own data, which had been mixed in with Ferrari's. 2005–2006: Success and decline 2005 saw an improvement in Toyota's fortunes. The team retained Trulli for the season but replaced Zonta with race-winner Ralf Schumacher from Williams. During the team's launch for their 2005 car, the TF105, Schumacher said that he had a