United States Court of Appeals
                            FOR THE EIGHTH CIRCUIT
                                    ___________

                                    No. 07-2290
                                    ___________

United States of America,           *
                                    *
           Appellee,                * Appeal from the United States
                                    * District Court for the
      v.                            * District of Minnesota.
                                    *
Jorge Armando Salinas Alarcon,      * [UNPUBLISHED]
                                    *
           Appellant.               *
                               ___________

                              Submitted: April 7, 2009
                                 Filed: April 9, 2009
                                  ___________

Before RILEY, SMITH, and BENTON, Circuit Judges.
                            ___________

PER CURIAM.

      Jorge Alarcon pled guilty to conspiring to distribute more than 1,000 kilograms
of marijuana, in violation of 21 U.S.C. §§ 846 and 841(b)(1)(A), and the district court1
sentenced him to the statutory minimum of 120 months in prison. On appeal, his
counsel has moved to withdraw and has filed a brief under Anders v. California, 

(1967). Alarcon seeks appointment of new counsel and has filed a pro se
supplemental brief.



      1
      The Honorable Richard H. Kyle, United States District Judge for the District
of Minnesota.
      Counsel argues in the Anders brief that the sentence imposed is unreasonable.
We disagree. See United States v. Vaughn, 

, 804-05 (8th Cir. 2008)
(reviewing sentence for procedural error and substantive reasonableness), cert. denied,

(2009); see also United States v. Rojas-Coria, 

, 874 n.4
(8th Cir. 2005) (Supreme Court’s decision in United States v. Booker, 

(2005), has no impact on case involving sentence imposed as result of statutory
minimum).

       Alarcon’s pro se argument that his guilty plea was not knowing or voluntary is
not cognizable in this appeal, see United States v. Villareal-Amarillas, 

,
932 (8th Cir. 2006) (claim that guilty plea was not knowing and intelligent was not
cognizable on direct appeal where defendant did not attempt to withdraw guilty plea
in district court); United States v. Murphy, 

, 716 (8th Cir. 1990) (claim
that guilty plea was involuntary must first be presented to district court and is not
cognizable on direct appeal); and his claim that his counsel was ineffective is more
properly raised in a motion under 28 U.S.C. § 2255, see United States v. Ramirez-
Hernandez, 

, 826-27 (8th Cir. 2006). By his guilty plea, Alarcon has
waived any non-jurisdictional challenge to his prosecution, see Smith v. United States,

, 657 (8th Cir. 1989) (per curiam), and he cannot challenge the drug
quantity used for sentencing because he stipulated to the amount in his plea
agreement, cf. United States v. Nguyen, 

, 783 (8th Cir. 1995) (defendant
who explicitly and voluntarily exposes himself to specific sentence may not challenge
that punishment on appeal).

      Having reviewed the record in accordance with Penson v. Ohio, 

(1988), we have found no nonfrivolous issues. Accordingly, we grant counsel’s
motion to withdraw and deny Alarcon’s motions.

      The judgment of the district court is affirmed.
                     ______________________________

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