Not defending the action, but what's the crime? What I'm asking for is a citation to USCode.
18 USC 1038 is limited to hoaxes about "weapons offenses."
I think 18 USC 1001 doesn't apply, because the government is allowed to lie to the public, and especially to suspects. it;s done all the time to get confessions and otherwise elicit evidence.
The court might have a contempt widget of its own, but that's not a criminal offense, there being no statute.
It's my (not comprehensively studied) point of view that the remedy for fraudulently obtained warrant is that the evidence becomes inadmissible at trial.
In order to secure a warrant a law enforcement official must submit a sworn statement attesting to the facts that justify the warrant. If the sworn statement is false, the law officer is guilty of perjury. Not only that, but the entire case would likely be thrown out of court.