On 17 July 2008, Riccò tested positive for the banned blood booster Continuous Erythropoiesis Receptor Activator (or CERA, a variant of Erythropoietin), from a sample taken following the fourth stage, making him the third rider to test positive for this substance in the 2008 Tour de France after Moisés Dueñas of Barloworld and Manuel Beltrán of Liquigas. He was immediately ejected from the Tour and his team Saunier Duval withdrew of their own volition. Saunier Duval announced the next day that team manager Mauro Gianetti had "lost faith in" Riccò and that he had been fired from the team; Riccò spent the night at the police station and was indicted on charges of "use of poisonous substances". He denied the charges and told RAI television;