 The subsequent investigation into his doping activities and the allegations he made led to the questioning of several members of the Kelme team in April 2004.These included Eufemiano Fuentes who was at that time the current Kelme team doctor, Walter Virú the team doctor before Fuentes, and Alfredo Córdova who was working for Liberty Seguros but was involved with Kelme in 2003.An investigation began into the practises of Fuentes in early 2006 by Central Operating Unit, the anti-drug trafficking arm of the Spanish Guardia Civil.