Derrick Damon Rainwater, federal prisoner # 25805-077, appeals the denial of his motion to dismiss the indictment, construed as a 28 U.S.C. § 2241 petition. Rainwater, however, has failed to brief the district court’s determination that his failure to show the 28 U.S.C. § 2255 remedy inadequate or ineffective precluded him from proceeding pursuant to § 2241; therefore, he has waived review of that issue and has not shown an entitlement to relief. See Yohey v. Collins, 985 F.2d 222, 224-25 (5th Cir. 1993).

AFFIRMED.