Career
After the Gerolsteiner team announced they would not be in existence for the 2009 season, Kohl signed with UCI ProTeam Silence–Lotto for three years. He was banned from the sport for two years after testing positive for performance enhancing drugs in October 2008. On 13 October 2008, L"Equipe announced that Kohl had tested positive for CERA (continuous erythropoitin receptor activator, a third-generation variant of erythropoietin, aka EPO) used during the Tour de France.
On the 15th he admitted his drug use.
His results were removed, but his third-place finish in the 2008 Tour and his Mountain Classification championship (polka dot jersey) have not been remade. The next day, Silence-Lotto terminated Kohl"s contract with the team
On 24 November 2008, Kohl was banned for two years by the Austrian anti-doping agency (NADA). His ex-manager, Stefan Matschiner, was arrested on 31 March 2009 in Austria and charged with selling doping substances.
Kohl stated that he was "not surprised" by the arrest.
Kohl"s results for the 2008 Tour de France have been removed in the official Tour de France results, but the definitive classification has not been published yet.