OPINION

Daniel Johnson Willis appeals the district court’s grant of the Government’s motion to dismiss his complaint 1 for failure to state a claim pursuant to Fed.R.Civ.P. 12(b)(6). 2 We have reviewed the record and find no reversible error. As the district court concluded, the Department of Justice is immune from suit. See Radin v. United States, 699 F.2d 681, 684-85 (4th Cir. 1983). Willis did not allege any personal involvement on the part of Attorney General Ashcroft, and federal officials cannot be held liable on a theory of respondeat superior. Monell v. Dep’t of Social Servs., 436 U.S. 658, 694, 98 S.Ct. 2018, 56 L.Ed.2d 611 (1978). To the extent Willis alleged actions on the part of the defendant district judge that were not undertaken in the clear absence of jurisdiction, the judge is entitled to absolute immunity. Stump v. Sparkman, 435 U.S. 349, 98 S.Ct. 1099, 55 L.Ed.2d 331 (1978). To the extent Willis alleges the judge engaged in a conspiracy, those allegations are conclusory and thus give no basis for relief. Phillips v. Mashburn, 746 F.2d 782, 785 (11th Cir. 1984). Finally, the marshals are also entitled to qualified immunity because their conduct in questioning Willis for a short time based on a perceived threat to a district judge did not violate a clearly established right. See, e.g., Hope v. Pelzer, 536 U.S. 730, 739, 122 S.Ct. 2508, 153 L.Ed.2d 666 (2002).

We affirm the district court’s order denying relief on Willis’ complaint. We grant Willis’ motion to amend his informal brief; the amended brief has been duly filed and considered. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before the court and argument would not aid the decisional process.

AFFIRMED.