What is the standard of review of a motion to suppress?

This court's standard of review of a trial court's ruling on a motion to suppress "is well established. We defer to the trial court's factual findings, express or implied, where supported by substantial evidence. In determining whether, on the facts so found, the search or seizure was reasonable under the Fourth Amendment, we exercise our independent judgment." (People v. Glaser (1995) 11 Cal.4th 354, 362.)