Unpublished opinions are not binding precedent in this circuit.

Craig Maurice Harris appeals the district court’s order denying his 18 U.S.C. § 3582(e)(2) (2012) motion and seeks to appeal the district court’s order dismissing as successive his 28 U.S.C. § 2255 (2012) motion. * Harris makes no argument as to the denial of relief on his § 3582(c)(2) motion. Therefore, Harris has waived appellate review of that order. See United States v. Winfield, 665 F.3d 107, 111 n.4 (4th Cir. 2012) (stating argument not raised in opening brief considered waived). Accordingly, we affirm the district court’s order denying § 3582(c)(2) relief. United States v. Harris, No. 5:12-cr-00120-D-1 (E.D.N.C. May 9, 2017).

The district court’s order dismissing Harris’ § 2255 motion is not appealable unless a circuit justice or judge issues a certificate of appealability. 28 U.S.C. § 2253(c)(1)(B) (2012). A certificate of ap-pealability will not issue absent “a substantial showing of the denial of a constitutional right.” 28 U.S.C. § 2253(c)(2) (2012). When the district court denies relief on procedural grounds, the prisoner must demonstrate both that the dispositive procedural ruling is debatable, and that the motion states a debatable claim of the denial of a constitutional right. Slack v. McDaniel, 529 U.S. 473, 484-85, 120 S.Ct. 1595, 146 L.Ed.2d 542 (2000).

We have independently reviewed the record and conclude that Harris has not made the requisite showing. Accordingly, we deny a certificate of appealability and dismiss the appeal with respect to the § 2255 motion. 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 IN PART; DISMISSED IN PART