Thomas Ciprano, federal prisoner #23148-034, appeals the district court’s dismissal of his 28 U.S.C. § 2241 petition challenging his life sentence as a career offender following his 1992 conviction on drug-trafficking charges. He renews his claim that he was improperly sentenced and asserts that a fundamental miscarriage of justice will result from the failure to consider the merits of his claim. However, even if his brief is liberally construed, Ciprano makes no argument that the district court erred in determining that he did not meet the criteria for raising his claims in this § 2241 petition pursuant to the savings clause of 28 U.S.C. § 2255(e). He has thus abandoned the only issue on appeal by failing to brief it. See Yohey v. Collins, 985 F.2d 222, 225 (5th Cir. 1993).

The appeal is without arguable merit, see Howard v. King, 707 F.2d 215, 219-20 (5th Cir. 1983), and is dismissed as frivolous. See 5th Cir. R. 42.2. The instant petition and appeal are continuations of Ciprano’s repetitious filings in an attempt to circumvent the requirements for filing a successive § 2255 motion. Ciprano is warned that any future frivolous or repetitive filings will subject him to sanctions.

APPEAL DISMISSED; SANCTION WARNING ISSUED.