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.