he followed it and pulled it over.  Donohoe ordered Stewart out of the car and placed him in the back of the patrol car.  Donohoe then searched the car and seized a backpack from the front passenger side of the car.  He unzipped the front of the backpack and seized a plastic bag that contained thirteen smaller bags of crack cocaine.  After Stewart was taken to jail for processing, Donohoe searched the backpack more thoroughly and seized a pistol, a black ski mask, books, documents, and digital scales.


6
Because probable cause existed to search the vehicle, the police could properly conduct a probing search of the backpack found within the vehicle.  See Ross, 456 U.S. at 823.   Moreover, it was permissible for1. Field of the Invention
This invention relates to an air conditioning unit for automobiles, more specifically, a bypass means for the ambient air introduced into the air conditioning unit to bypass the evaporator therein.
2. Description of the Prior Art
A conventional air conditioning unit for automobiles of the type disclosed, for example, in Japanese Patent Published Application No. SHO-57-172815 comprises a casing for defining a ventilation duct, a fan for drawing the ambient air into the ventilation duct, an evaporator for dehumidifying the introduced ambient air, a heater core for heating the introduced ambient air, and a water collecting portion formed on the bottom wall of the casing near the evaporator so as to receive the water produced at and dripping from the evaporator. The water collecting portion is