Matthew Norman Simpson appeals the district court’s order affirming the magistrate judge’s pretrial detention order. The district court determined that no con *538 dition or combination of conditions would reasonably assure Simpson’s presence at trial.

A judicial officer may order a defendant detained pending trial if the officer finds, by a preponderance of the evidence, that “no condition or combination of conditions will reasonably assure the appearance of the person,” or, by clear and convincing evidence, that “no condition of combination of conditions will reasonably assure ... the safety of any other person and the community.” § 3142(e), (f); see United States v. Fortna, 769 F.2d 243, 250 (5th Cir. 1985). Absent an error of law, we will uphold a district court’s pretrial detention order if it is supported by the proceedings in that court. United States v. Rueben, 974 F.2d 580, 586 (5th Cir. 1992). The district court’s determination that the Government had shown by a preponderance of the evidence that no condition or combination of conditions could reasonably assure Simpson’s presence at trial is supported by the record. See United States v. Westbrook, 780 F.2d 1185, 1189-90 (5th Cir. 1986); Fortna, 769 F.2d at 250.

Moreover, Simpson has not shown that any error in denying production of government documents pursuant to the Jencks Act, 18 U.S.C. § 3500, and Federal Rule of Criminal Procedure 26.2 prejudiced his substantial rights. United States v. Doucette, 979 F.2d 1042, 1044-45 (5th Cir. 1992). Thus, Simpson is not entitled to a new detention hearing on this basis. Id.

AFFIRMED.