Oh yes, when papa d showed up at the airport without that cash the FBI agents shit their pants
https://theconservativetreehouse.com/2019/05/11/explosive-foia-documents-show-evidence-of-weissmann-mueller-entrapment-scheme/
According to Politico:
[W]hen he was arrested [detained] at Dulles Airport on July 27 after coming off a flight from Munich, prosecutors had no warrant for him and no indictment or criminal complaint. The complaint would be filed the following morning and approved by Howell in Washington.
And when prosecutors filed the complaint the next day they got a spoken order from Howell to seal it, but followed up with a written request that they could take to the magistrate in Alexandria, where they showed up almost an hour later than she expected.
All of it suggests something of a scramble, rather than a carefully prepared plan to take Papadopoulos into custody. (more)