From CNN...Could someone clarify what this means, exactly?
"Federal prosecutors have issued grand jury subpoenas to associates of former National Security Advisor Michael Flynn seeking business records, as part of the ongoing probe of Russian meddling in last year's election, according to people familiar with the matter. CNN learned of the subpoenas hours before President Donald Trump fired FBI director James Comey."
(A grand jury determines the validity of an accusation and then it either goes to a trial or is dismissed.)