F I L E D
                                                                  United States Court of Appeals
                                                                          Tenth Circuit
                       UNITED STATES COURT OF APPEALS
                                                                          MAY 3 1999
                                    TENTH CIRCUIT
                                                                     PATRICK FISHER
                                                                              Clerk

 UNITED STATES OF AMERICA,

           Plaintiff - Appellee,
 vs.                                                    No. 98-2009
                                                 (D.C. No. CR-94-211 MV)
 LEVONE RAY MADEN,                                       (D.N.M.)

           Defendant - Appellant.


                              ORDER AND JUDGMENT *


Before ANDERSON, KELLY, and BRISCOE, Circuit Judges. **


       Mr. Maden was convicted and sentenced after a jury trial for possession

with intent to distribute more than fifty grams of cocaine base in violation of 21

U.S.C. § 841(b)(1)(A). In an earlier appeal, United States v. Maden, 

(10th Cir. 1997), we affirmed Mr. Maden’s conviction, but held that the

district court erred in departing downward from the guideline sentencing range.


       *
        This order and judgment is not binding precedent, except under the
doctrines of law of the case, res judicata, and collateral estoppel. This court
generally disfavors the citation of orders and judgments; nevertheless, an order
and judgment may be cited under the terms and conditions of 10th Cir. R. 36.3.
       **
         After examining the briefs and the appellate record, this three-judge
panel has determined unanimously that oral argument would not be of material
assistance in the determination of this appeal. See Fed. R. App. P. 34(a); 10th
Cir. R. 34.1 (G). The cause is therefore ordered submitted without oral argument.
We remanded so that the court could resentence Mr. Maden within the applicable

guideline range.

      In this appeal, Mr. Maden challenges the constitutionality of the disparity

between penalties for crack cocaine and powder cocaine, as well as the

sufficiency of the evidence for a finding that the substance he possessed was

actually crack cocaine. 1 Our jurisdiction arises under 28 U.S.C. § 1291 and 18

U.S.C. § 3742(a), and we affirm.

      As an initial matter, the mandate rule precluded the district court from

hearing these issues because the panel in Mr. Maden’s initial appeal specifically

instructed the court to resentence Mr. Maden within the applicable guideline

range. See United States v. Webb, 

, 587-88 (10th Cir. 1996). None

of the exceptional circumstances identified in Webb, which would have permitted

the court to depart from our mandate, were present in this case. See 

      However, even apart from the mandate rule, both issues are without merit.

We have ruled numerous times that the Constitution is not violated by the

disparity in treatment between crack cocaine and powder cocaine. See United

States v. Williamson, 

, 1530 (10th Cir. 1995) (citing cases).

      Mr. Maden argues that the government failed to prove that the substance he


      1
        Although represented by counsel, Mr. Maden makes this second
challenge in a pro se “Supplemental Petition for Appellant’s Opening Brief.” The
government has responded to the argument; thus we consider it.

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possessed was crack cocaine because it allegedly was not at least fifty percent

pure. However, neither the Sentencing Guidelines nor the statute under which he

was convicted establishes a purity level for crack cocaine. See USSG § 2D1.1(c)

notes to drug quantity table (D) (compare notes (B) & (C) which establish purity

levels for “PCP” and “Ice”); 21 U.S.C. § 841(b)(1)(A).

      AFFIRMED.


                                       Entered for the Court


                                       Paul J. Kelly, Jr.
                                       Circuit Judge




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