If this rider was innocent, wouldn't he come out to the media immediately to say he is and have the B sample tested?
*EDIT - I didn't see this:
Adds Sinkewitz' reaction:
“Me? Why me? I don't know anything about it. This can't be,” was his reaction, reported in German on-line sports magazine Kicker. “I am due to have an operation and I can't think about it now.”