Cofidis rider Remy Di Gregorio of France is seen during the official team presentation in Liege in this June 28, 2012 file photo. French rider Di Gregorio was being detained for questioning by French police after an investigation was opened into alleged doping substance trafficking, a gendarmerie source said on July 10, 2012. REUTERS/Stephane Mahe/Files (FRANCE - Tags: SPORT CYCLING HEADSHOT CRIME LAW DRUGS SOCIETY)