Prove it. She didn't fail any drugs tests.
It is hard to fail a drugs test when you do not provide a sample, If I get stopped by the police because they think I'm drunk and I fail to produce a sample does that mean I'm not a drunk driver?
If my livelyhood depended on making myself avalaible for drugs test I would do so, Konstantinos Kederis and Ekaterini Thanou got slaughtered in the press after they missed giving drugs samples in Athens.
I think you're right. Also, she has passed 14 tests this year, as well as before the missed tests, which, i think, prove that she wasn't taking drugs, since as far as i know, drugs will only help if taken regularly, not if you just take them one-off
Fine she gave additional samples that were clear, the drugs could have been used over a short spell to help recover from injury and then left the body.
She is British and has a chance of a medal at the Olympics so we will presume she is innocent. If she was from a former Eastern block country would you be so willing to accept her excuse?