Sinkewitz appealed to the German Institution of Arbitration which ruled that the calculation of the sample analysis was "not sufficiently documented and therefore the ADRV Rule Violation not validly proven," thus clearing Sinkewitz of the ADRV and allowing him to apply for a new license. The German anti-doping agency appealed to the Court of Arbitration for Sport (CAS), who in February 2014 found Sinkewitz "guilty of an Anti-Doping Rule Violation in the form of the presence of recombinant hGH in his body specimen", banning him for 8 years, imposing a €38,500 fine, and disqualifying all his results from the 2011 GP di Lugano. Later confirmed in the evidence of the USADA report in 2012, as well as by University of Freiburg doctors, to have done blood transfusions during the 2006 Tour de France alongside some of his teammates on the T-Mobile Team.