We generally review a trial court's ruling on a motion to suppress for abuse of discretion. Villarreal v. State, 935 S.W.2d 134, 138 (Tex.Crim.App.1996). We review de novo a trial court's determination of reasonable suspicion and probable cause. Guzman v. State, 955 S.W.2d 85, 89 (Tex.Crim.App.1997). However, we afford almost total deference to a trial court's determination of historical facts that the record supports, especially when the findings are based on an evaluation of credibility and demeanor. Id. In reviewing a ruling on a question of the application of law to facts, we review the evidence in the light most favorable to the trial court's ruling. Id.