United States Court of Appeals
                            FOR THE EIGHTH CIRCUIT
                                   ___________

                                   No. 02-3642
                                   ___________

United States of America,               *
                                        *
            Appellee,                   *
                                        * Appeal from the United States
      v.                                * District Court for the
                                        * Eastern District of Missouri.
Felipe Lothridge,                       *
                                        *
            Appellant.                  *
                                   ___________

                             Submitted: March 13, 2003

                                 Filed: June 11, 2003
                                  ___________

Before BOWMAN, MORRIS SHEPPARD ARNOLD, and RILEY, Circuit Judges.
                         ___________

BOWMAN, Circuit Judge.

       Felipe Lothridge was convicted of possession with intent to distribute crack
cocaine. Previously, we remanded his appeal to the District Court1 with instructions
to undertake de novo review of the objected-to magistrate judge findings as required
by 28 U.S.C. § 636(b)(1) (2000). See United States v. Lothridge, 

(8th
Cir. 2003). We retained jurisdiction over the appeal. On remand, the District Court
performed the required de novo review, made findings of fact and reached

      1
       The Honorable Carol E. Jackson, United States District Judge for the Eastern
District of Missouri.
conclusions of law, and again denied Lothridge's motion to suppress evidence. We
affirm.

       We review a district court's findings of fact for clear error and its conclusions
of law regarding its denial of a motion to suppress de novo. United States v. Booker,

, 931 (8th Cir. 2001), cert. denied 

(2003). Lothridge
urges that the drugs seized during the traffic stop should have been suppressed
because he did actually stop at the stop sign and, therefore, the police did not have
probable cause to stop him. See Whren v. United States, 

, 810 (1996)
(noting that the "decision to stop an automobile is reasonable where the police have
probable cause to believe that a traffic violation has occurred"). We see no clear error
in the District Court's finding that Officer Crews was more credible than Lothridge,
who admitted at his suppression hearing that he was unfamiliar with the area where
the traffic violation occurred. Suppression Hr'g Tr. at 25. After a de novo review of
the District Court's conclusions of law—based on findings of fact that are not clearly
erroneous—we affirm the denial of the suppression motion.

       Lothridge also urges that the District Court erred when it admitted evidence of
his prior bad acts. Specifically, Lothridge maintains that the admission of his prior
narcotics offenses was unfairly prejudicial. See United States v. Tomberlin, 

, 1320 (8th Cir. 1994) (noting abuse-of-discretion standard of review). We
disagree. The prior convictions were admissible under Rule 404(b) to prove motive,
opportunity, intent, preparation, plan, knowledge, identity, or absence of mistake or
accident. See Fed. R. Evid. 404(b). Moreover, the District Court properly instructed
the jurors that in this case the evidence could only be used "to decide whether the
defendant knew that he had possession of cocaine base and whether he intended to
distribute cocaine base." Trial Tr. at 170-71. The limiting instruction cured whatever
unfair prejudice the introduction of Lothridge's prior convictions occasioned. See
United States v. Franklin, 

, 659 (8th Cir.) ("the presence of a limiting
instruction diminishes the danger of any unfair prejudice arising from admission of

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other acts"), cert. denied, 

(2001). In any event, any error regarding the
admission of the prior convictions was harmless. See Chapman v. California, 

, 24 (1967). At trial, Lothridge was a glib and obliging witness and admitted
at least seven times that he possessed the drugs in question and that, in fact, he had
sold drugs to other people. Trial Tr. at 179-91. The District Court did not abuse its
discretion when it admitted Lothridge's prior convictions into evidence.

       Lothridge's final claim is that the crack cocaine that the police recovered when
he was arrested should not have been admitted into evidence because of "obvious
tampering." Appellant Br. at 4. Although Lothridge questioned the Missouri state
criminologist extensively on this issue, he never objected to the admission of the
drugs into evidence; therefore, we review the issue only for plain error. United States
v. Green, 

, 1114 (8th Cir. 1998); Fed. R. Crim. Proc. 52(b). Lothridge
bases his tampering charge on the fact that on the three occasions on which the crack
cocaine was weighed in preparation for trial, it was analyzed to contain 41.16, 35.86,
and 36.00 grams, respectively. We have noted that in order for evidence to be
admissible, a chain of custody must exist that shows a reasonable probability that the
evidence has not been changed or altered. United States v. Cannon, 

,
1503 (8th Cir. 1996). Here, we are satisfied that such a chain of custody exists and
that the government adequately accounted for the differences in weight. Moreover,
Lothridge never denied that the substance he possessed was crack cocaine or that the
crack cocaine offered into evidence was the same as that seized; in fact, he freely
admitted as much in court. Nor is it the case that the potentially differing weights of
the drugs could affect Lothridge's sentence. Rather, Lothridge's base-offense level
of thirty reflects the fact that he possessed between thirty-five and fifty grams of
cocaine base. See U.S.S.G. §§ 2D1.1(a)(3), 2D1.1(c)(5) (2002). We are thoroughly
satisfied the District Court did not commit plain error when it exercised its discretion
by admitting the crack cocaine into evidence.

      For the foregoing reasons, the judgment of the District Court is affirmed.

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A true copy.

      Attest:

         CLERK, U.S. COURT OF APPEALS, EIGHTH CIRCUIT.




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