It seems a case about Child Pornography - http://ia800908.us.archive.org/9/items/gov.uscourts.mdd.2362...
A Gag order would have come with a National Security related incident
>> Snowden invited rights workers to a July meeting from the address "edsnowden@lavabit.com," according to a human rights specialist who attended the meeting
http://www.theverge.com/2013/8/8/4602966/email-service-used-...
Does this submission intend to discredit Lavabit's decision to shutdown? Looks a bit.. disinfo-ish, but I'd rather give the submitter benefit of the doubt.
Despite being completed on 10 June, it was just uploaded earlier today.
The scary thing about an NSL is that there is no automatic time limit to the gag order it creates, and due process to request the gag to be lifted is severely limited. In other words, not only don't we know about the NSLs issued, we don't even know when we might get a chance to know about them which makes any oversight of their use practically impossible.