Not knowing Victor personally I wont (apart from the above) disrespect him as such but... We've had a bunch of Olympic athletes, here and in the US, lay claim to having used supplements laced with this or that. Or that their coach gave them pills to swallow or, funniest yet, 'vitamin injections' (yeah twice a week lol).
Now there WAS some evidence of a few products being cross-contaminated. But we were talking about trace amounts. There was even a few products, way back in the day (like 20+ years), that deliberately spiked their initial batch of products to boost sales . But now... forget about it. And even if there was trace amounts I'd doubt they were of a level to be either useful or to fail a test. I'd bet a few bucks his case against the company will fail. But their sales will go up