Wrong. Federal venue is the district where the crime was committed. In cases like wire and mail fraud, you can show venue at each end of the transaction (i.e., where the fraudulent communication was sent or where it was received).
A federal prosecutor cannot, however, simply choose to file charges against a defendant in whichever one of the 94 federal judicial districts in the U.S. that the prosecutor wants.
Okay so the grand jury that's been convened in NEW HAVEN CONNECTICUT is a just product of my imagination... you just told me so, I think.
What you're saying is actually correct - if the crime, perp, location were all in DC - like a simple bribery case etc.
That's not what this is, with interstate and even international implications.