The have been many cases in Russian airports with people who may not be welcome there (BG would fit that sadly) where they'll "find" something in the persons bag and it may not be enough to arrest them but because that person isn't a lawyer they'll let the bag go out of their sight and next thing you know there will be tons of drugs in that persons bag. It's especially terrifying because Russia may want something from the US.
that would not be surprising at all. i wouldn't be super shocked if she was bringing in a vape pen, but it sounds like the charges they're talking about are more serious and closer to trafficking than possession. which sounds fake as hell and like they're using something small as an excuse.
this could get worse before it gets better.