Unpublished opinions are not binding precedent in this circuit.

Rene Enmanuel Rivera Portillo, a native and citizen of El Salvador, petitions for review of an order of the Board of Immigration Appeals (Board) dismissing his appeal from the immigration judge’s denial of his applications for asylum, withholding of removal, and protection under the Convention Against Torture (CAT). We have thoroughly reviewed the record, including the transcript of Portillo’s merits hearing before the immigration court and all supporting evidence. Portillo has waived review of the agency’s decision that he was not a member of a cognizable social group for purposes of asylum and withholding of removal because, in his appellate brief, he fails to challenge the finding that his group lacked particularity and social distinction. See IGEN Int’l, Inc. v. Roche Diagnostics GmbH, 335 F.3d 303, 308, 309 n.3 (4th Cir. 2003) (“Failure to present or argue assignments of error in opening appellate briefs constitutes a waiver of those issues.”). Regarding the Board’s denial of protection under the CAT, we conclude that the record evidence does not compel a ruling contrary to any of the administrative factual findings, see 8 U.S.C. § 1252(b)(4)(B) (2012), and that substantial evidence supports the Board’s decision. See INS v. Elias-Zacarias, 502 U.S. 478, 481, 112 S.Ct. 812, 117 L.Ed.2d 38 (1992). We also conclude that the Board’s denial of the motion to remand was not an abuse of discretion. See Hussain v. Gonzales, 477 F.3d 153, 155 (4th Cir. 2007) (stating standard of review).

Accordingly, we deny the petition for review. 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.

PETITION DENIED