What is the test for probable cause to search a car's trunk?

2 To satisfy the "probable cause" prong of the Dumas-Cook-Johnson test, an officer must be "aware of facts that would lead a man of ordinary caution or prudence to believe, and conscientiously to entertain, a strong suspicion that the object of the search is in the particular place to be searched." (Wimberly v. Superior Court, supra, 16 Cal.3d at p. 564, 128 Cal.Rptr. 641, 547 P.2d 417.) Moreover, because of the greater expectation of privacy associated with a car trunk, probable cause to search the passenger compartment is not necessarily sufficient to justify a search of the trunk. (See id., 16 Cal.3d at p. 568, 128 Cal.Rptr. 641, 547 P.2d 417.) Probable cause to search the trunk in this case has been conceded. Therefore, that prong of the Dumas-Cook-Johnson test is not discussed further in this opinion.