Trаvis Homer Key appeals the district court’s denial of his motion for the appointment of counsel to assist in his filing of a successive habeas corpus petition. We vacate the opinion of the district court and dismiss for lack of jurisdiction.
In 1992, Key pled guilty to second degree murder on federal property and was sentenced to forty years in prison and five years of supervised release. His sentence was affirmed on direct appeal in 1993. In *774 1997, Key filed a petition for federal habe-as corpus, alleging that the district court failed to comply with Federal Rule of Criminal Procedure 11 and that his counsеl provided ineffective assistance. The petition was denied, and this court denied Key a certifiсate of appealability in 1998.
On June 9, 1999, Judge Walter Smith’s chambers received a two-page letter from Key asking that counsel be .appointed to assist him in filing a future petition for postconviction relief. The district court construed this as a motion for the appointment of counsel and denied it. Key aрpeals.
Even though the government does not challenge this appeal on jurisdictional grounds, “we must always be sure of our appellate jurisdiction and, if there is doubt, we must address it, sua sponte if necessary.”
Castaneda v. Falcon,
We find that the district court lacked jurisdiction over Key’s motion. Since Key had already filed one federal habeas petition, he needed this court’s permission before he could again сhallenge his conviction or sentence in the district court.
See
28 U.S.C. § 2244(b)(3)(A) (“Before a second or successivе application permitted by this section is filed in the district court, the applicant shall move in the appropriate court of appeals for an order authorizing the district court to considеr the application.”). If he filed a second habeas petition in the district court, either
pro se
or assisted by counsel, it would be immediately dismissed for lack of jurisdiction.
See Hooker v. Sivley,
Accordingly, § 2244(b)(3)(A) acts as a jurisdictional bar to the district court’s asserting jurisdiction over any successive habeas petition until this court has granted the petitioner permission to file one.
See Hooker,
Key’s motion for the appointment of counsel should have been brought in this court as pаrt of his § 2244(b)(3) petition for authorization to file a successive habe-as petition in the district court. In such а
*775
context, if Key made the requisite showing, we would have the power to appoint counsel on his bеhalf.
See
18 U.S.C. § 3006(A)(2);
Self v. Blackburn,
Accordingly, as the district сourt lacked jurisdiction to rule on Key’s motion for the appointment of counsel, we VACATE the judgment of thе district court and DISMISS this appeal for lack of jurisdiction. 1
Notes
. We DENY Key’s motion to supplement and corrеct the record and Key’s motion for leave to file exhibits with his reply brief. We GRANT Key's motion to file his reply brief with excess pages and accept Key’s reply brief in present form.
