Our review of a trial court's denial of a motion to suppress is "strictly limited to determining whether the trial judge's underlying findings of fact are supported by competent evidence, in which event they are conclusively binding on appeal, and whether those factual findings in turn support the judge's ultimate conclusions of law. State v. Cooke, 306 N.C. 132, 134, 291 S.E.2d 618, 619 (1982). "The trial court's conclusions of law . . . are fully reviewable on appeal. State v. Hughes, 353 N.C. 200, 208, 539 S.E.2d 625, 631 (2000).