Is a jury's finding that a defendant is guilty of a crime against the appellant not to be overturned on appeal?

is the jury, not the appellate court, which must be convinced of the defendant's guilt beyond a reasonable doubt. [Citation.] Therefore, an appellate court may not substitute its judgment for that of the jury. If the circumstances reasonably justify the jury's findings, the reviewing court may not reverse the judgment merely because it believes that the circumstances might also support a contrary finding. [Citations.]" (People v. Ceja (1993) 4 Cal.4th 1134, 1139.) Appellant does not get a second bite at the apple on appeal.