Who confesses under oath to leaking?

One of the most famous moments in the history of U.S. intelligence came in March 2013, when Director of National Intelligence James Clapper told senators that the NSA does not "wittingly" collect "any type of data at all" on millions or hundreds of millions of Americans. After Edward Snowden went public with his revelations, it became evident that Clapper was lying. Of course he was lying, indicated Saxby Chambliss of the Senate Select Committee on Intelligence. Clapper couldn't reveal classified information, not even to the Senate. And the senator asking the question knew it when he put Clapper in that uncomfortable position. Seznam Zprávy's direct sources in the matter of Jan Hamáček's alleged willingness to do a deal with Moscow regarding Vrbětice are in a similar position. Even if the spy agencies and courts authorize them to speak about the classified meeting, will they really be willing to admit that they violated the law by leaking the information to Seznam?