Unpublished opinions are not binding precedent in this circuit.

David Gambino filed an action in the district court seeking preliminary injunctions to recover and preserve evidence for use in a future lawsuit against prison officials, The district court denied the motions and dismissed the complaint because the Government, once on notice of the potential lawsuit, was already obligated to preserve any existing evidence and provided documentation that it was complying with that obligation. On appeal, we confine our review to the issues raised in the Appellant’s brief. See 4th Cir. R. 34(b). Because Gambino’s informal brief does not challenge the basis for the district court’s disposition, Gambino has forfeited appellate review of the court’s order. See Williams v. Giant Food Inc., 370 F.3d 423, 430 n.4 (4th Cir. 2004). In any event, the district court did not abuse its discretion in denying the motions for injunctive relief because Gambino.failed to demonstrate that he was likely to suffer irreparable harm in the absence of an injunction. See Winter v. Nat. Res. Def. Council, Inc., 555 U.S. 7, 22, 129 S.Ct. 365, 172 L.Ed.2d 249 (2008).

Accordingly, we affirm the district court’s judgment. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before this court and argument would not aid the decisional process.

AFFIRMED