Elston Robertson, Louisiana prisoner # 104013, appeals the dismissal of his 42 U.S.C. § 1983 complaint as frivolous and for failure to state a claim pursuant to 28 U.S.C. § 1915(e)(2). The district court held that Robertson’s § 1983 claim was barred by both prosecutorial immunity and Heck v. Humphrey, 512 U.S. 477,114 S.Ct. 2364, 129 L.Ed.2d 383 (1994). Robertson has faded to brief the district court’s Heck determination, and, therefore, that issue is waived and unreviewable. See Yohey v. Collins, 985 F.2d 222, 224-25 (5th Cir. 1993). He consequently cannot show the district court’s resolution of his claims to be erroneous.

Robertson’s appeal therefore lacks arguable merit and is dismissed as frivolous. See 5th Cir. R. 42.2; Howard v. King, 707 F.2d 215, 219-20 (5th Cir. 1983). Robertson is warned that the dismissal of this appeal as frivolous counts as a strike for purposes of 28 U.S.C. § 1915(g), in addition to the strike for the district court’s dismissal. See Patton v. Jefferson Corr. Ctr., 136 F.3d 458, 463-64 (5th Cir. 1998). We warn Robertson that once he accumulates three strikes, he may not proceed in forma pauperis in any civil action or appeal filed while he is incarcerated or detained in any facility unless he is under imminent danger of serious physical injury. See 28 U.S.C. § 1915(g).

The district court construed Robertson’s challenge to his confinement as a request for 28 U.S.C. § 2254 relief, and his notice of appeal was construed by this court as an appellate request for a certificate of appealability (COA) to appeal the dismissal of his habeas claims for failure to exhaust state court remedies. See Robertson v. Brindisi, No. 03-30832 (5th Cir. Mar.10, 2004) (unpublished). Robertson, however, has not shown “that jurists of reason would find it debatable whether the petition states a valid claim of the denial of a constitutional right and that jurists of reason would find it debatable whether the district court was correct in its procedural ruling.” See Slack v. McDaniel, 529 U.S. 473, 484, 120 S.Ct. 1595, 146 L.Ed.2d 542 (2000). His COA request is therefore DENIED.

APPEAL DISMISSED; STRIKE WARNING ISSUED; COA DENIED.