United States Court of Appeals
                            FOR THE EIGHTH CIRCUIT
                                    ___________

                                    No. 03-2342
                                    ___________

United States of America,                *
                                         *
                    Appellee,            * Appeal from the United States
                                         * District Court for the District
      v.                                 * of South Dakota.
                                         *
Larry Short Horn,                        *
                                         *      [UNPUBLISHED]
                    Appellant.           *
                                    ___________

                              Submitted: December 16, 2003

                                   Filed: December 22, 2003
                                    ___________

Before MORRIS SHEPPARD ARNOLD, HEANEY, and FAGG, Circuit Judges.
                         ___________

PER CURIAM.

        Sylvia Little accused Larry Short Horn of assaulting her and breaking her
collarbone after they spent the day drinking at Short Horn’s cabin on the Pine Ridge
Indian Reservation. Short Horn denied assaulting Little and surmised she hurt herself
in a drunken fall. The Government charged Short Horn, and Little and Short Horn
testified at trial. Choosing to believe Little, a jury found Short Horn guilty of simple
assault and assault resulting in serious bodily injury in Indian country. See 18 U.S.C.
§§ 113(a)(5), 113(a)(6), 1153. The district court* sentenced Short Horn to seventy-
eight months in prison.

       On appeal, Short Horn first asserts the evidence was insufficient to convict him
of assault resulting in serious bodily injury. Viewing the evidence in the light most
favorable to the verdict, we conclude a reasonable jury could find Short Horn guilty
beyond a reasonable doubt. The evidence showed Short Horn assaulted Little and
the assault resulted in serious bodily injury. See United States v. Two Eagle, 

, 790-91 (8th Cir. 2003) (elements of offense). The jury could properly
choose to believe Little. See United States v. Martinez, 

, 218 (8th Cir.
1992).

       Short Horn also argues the district court committed error in allowing Little’s
treating physician to testify about how bones break and whether Little’s injuries were
consistent with a fall or an assault. The district court did not abuse its discretion in
admitting the testimony. After Short Horn cross-examined the doctor suggesting
Little broke her collarbone in a fall rather than by being kicked with cowboy boots
by Short Horn, the district court held Short Horn had “opened the door” permitting
the Government to elicit testimony about whether Little’s broken collarbone was
consistent with having fallen to the ground. United States v. Beason, 

,
968 (8th Cir. 2000). The doctor testified the nature of the break of Little’s collarbone
was inconsistent with a fall to the dirt ground. Even if the testimony should not have
been admitted, any error in its admission was harmless. See United States v. Nelson,

, 897 (8th Cir. 1993). The doctor’s testimony was not conclusive–he
could only say that about 70% of the time a break like Little’s is not accidental.




      *
       The Honorable Karen E. Schreier, United States District Judge for the District
of South Dakota.

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       Last, Short Horn contends the prosecutor’s comments during closing argument
were improper because he vouched for the truthfulness of his witnesses and
interjected his personal beliefs about Short Horn’s honesty. Specifically, the
prosecutor argued Little had no motive to lie, Short Horn made up the story that Little
had fallen, and lied when he told that to investigators. Because Short Horn did not
object at trial, we reverse only if any error is plain and affects Short Horn’s
substantial rights. United States v. Kehoe, 

, 594 (8th Cir. 2002). Having
carefully reviewed the record, we conclude the comments were references to the
evidence at trial, reasonable inferences from the evidence, or responses to the defense
theory or closing argument by Short Horn. Even if the remarks were improper, they
did not rise to the level of plain error. See 

affirm the district court.
                   ____________________________




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