The interrogation took six hours.
Now Cas, the sports arbitration court, has made its decision.
Russian figure skating star Kamila Valieva, 15, will continue to compete in the Olympics in Beijing despite the doping suspicions, writes AP.
Valieva can thus start in the individual competition where she is the big favorite, but what happens to her gold from the team competition is not yet clear.
The positive doping test that Valieva is being investigated for is from 25 December.
The text is updated.