Yes, they publish very little that would upset their backers, but the nice thing about them is that they tend to share evidence. When there is not much public e

Yes, they publish very little that would upset their backers, but the nice thing about them is that they tend to share evidence. When there is not much public evidence (like in this case) they are the first to say so. Grozev was a traditional investigative journalist before he worked for Bellingcat. They have also worked with The Insider and many other traditional investigative journalism outfits in the east. It is not at all implausible that they should be able to contact two FSB people for feedback (especially when one of them is retired).