There are rumors that he's in jail for association with "Shaltai Boltai" hacker group, which published emails of D.Medvedev. Same for FSB officer, who supposedly worked with Stoyanov.
I’ve heard other rumors. I’ve heard he’s in jail because he failed to secure their systems from Ukrainian hackers and 1GB of confidential data was leaked: https://en.wikipedia.org/wiki/Surkov_leaks
But just hearing rumors doesn’t mean we know anything.
But just hearing rumors doesn’t mean we know anything.