** FILE ** Germany's Nils Schumann celebrates winning the gold medal in the men's 800 meter run at the Summer Olympics at the Olympic Stadium in Sydney in this Sept. 27, 2000 file photo. German athletics federation announced Monday, Nov 20, 2006, that it has started an investigation about doping allegations against German runners Nils Schumann and Grit Breuer. The investigation bases on a lawsuite against their former coach Thomas Springstein who was convicted on doping charges and given a suspended 16-month jail term for giving a banned hormone to a young sprinter. (AP Photo/Thomas Kienzle)