We haven't actually had a blip about Blumenthal in terms of whether he is being investigated. No word he is on the interview list, no word that his data has been seized. I do think the idea that the feds may have a whole cache of his emails unfiltered has to be unnerving, I don't know that we know when the feds got Lazar's data, maybe it had to be extradited with him. - However what the feds could get from Guccifer is his testimony on the original data he pulled from Blumenthal and also the data he possibly could have pulled from Hillary. Collecting evidence would be a first step towards investigating and then interviewing Blumenthal (and Hillary). Having said that, as previously indicated, they likely would not start just now getting evidence on Blumenthal directly from him but rather more likely that would have happened some time ago, and yet then again we don't know they haven't. Otoh it seems hard to believe given the environment that if they had it wouldn't have been leaked by now. But what good would any data previously gathered from Lazar be without any way to authenticate its derivation? Now they would have that. And like I said maybe they are just getting it.
eta - one more thought, maybe they do not need the data he pulled in any event, or to authenticate it, perhaps Lazar will just be used to show how easy it was to crack Blumenthal's email, and maybe from there how easy it was to get into Hillary's account (ohhhh say by emailing Hillary a file from Blumenthal's account?... or maybe just by guessing whatever kind of password a computer-illiterate grandma would use?...) and thereby show how negligent Hillary was in handling classified information. If they can do that, with someone who did it for private gratification, they can show how it easy it was for the best foreign intelligence services in the world to do the same.
