if crime goes "legitimate", it doesn't mean it disappears
it depends what they mean, if an ex mobster leaves the crime totally and his crime group disappears with the time its business became total legit
but if his crime groups is still active not
I think the problem is the western world doesn't yet know the mafia from the former Soviet countries well, they have no experience yet, just like the situation with the Italia mafia in the 30s.
i read that fbi has enough info about it, at least about how russians operate in the states