State of Tennessee v. Justin Mathis

A Shelby County Criminal Court jury convicted the appellant, Justin Mathis, of first degree premeditated murder, and the trial court sentenced him to life imprisonment. On appeal, the appellant claims that (1) the trial court erred by allowing an expert to testify about the appellant’s potential gang membership; (2) the trial court erred by allowing the State to introduce into evidence a picture of a gun stored in a witnesses’ cellular telephone; (3) the trial court erred by allowing into evidence a photograph of the victim’s heart; (4) the trial court erred by instructing the jury on criminal responsibility for the conduct of another; and (5) the evidence is insufficient to support the conviction. Based upon the record and the parties’ briefs, we affirm the judgment of the trial court.