In reviewing a motion to suppress evidence, what is the test for determining whether the search was constitutional?

In reviewing a trial court's decision to grant a motion to suppress evidence, we rely on the trial court's express and implied factual findings, provided they are supported by substantial evidence, to independently determine whether the search was constitutional. (See People v. Brown (2015) 61 Cal.4th 968, 975, 190 Cal.Rptr.3d 583, 353 P.3d 305.) "Thus, while we ultimately exercise our independent judgment to determine the constitutional propriety of a search or seizure, we do so within the context of historical facts determined by the trial court." ( People v. Tully (2012) 54 Cal.4th 952, 979, 145 Cal.Rptr.3d 146, 282 P.3d 173.) It is the trial court's

[253 Cal.Rptr.3d 519]