You are suggesting the Congressman from Texas is lying about this? Hehe...
I find it suspicious that a member of the LEGISLATIVE branch is doing the official release of information that is held by the EXECUTIVE branch.
Generally, I've found that when Congresscritters go running to the media with some breathless revelation of "declassified information," they're usually lying.
The Congressman is not the primary source. The Southern District U.S. Attorney Michael Shelby, is the primary source.