7. On August 13, 1981, the informant *924 contacted Officer Nepodal and told him that the shipment had arrived. Police then set up surveillance around Robish's house and observed people leaving the residence. One was carrying a large cardboard box and another a bag of some sort. The two drove off in separate cars, both of which were stopped by the police. The car with the box was driven by Robish's brother, Ron Robish, and the car with the bag was driven by another, who it appears had no involvement in the case. Ron Robish's vehicle was searched pursuant to a search warrant which had earlier been obtained, and the marijuana was found in a box in his car. The parties dispute who said what to whom aboutwas concealed or kept on the Robish property marijuana and cocaine. The basis for his belief was the information given to Lieutenant Olson by Officer Nepodal and the various other officers who observed the house and stopped the two vehicles.
Meanwhile, Robish was arrested when he was seen leaving his home. At the police station he told Sergeant O'Donnell where to find marijuana in the house and where to find cocaine in one of the cars. Armed with the search warrant, the police found marijuana in the basement of the house and cocaine in the car.
In attempting to determine whether the affidavit submitted by Officer Griffith was sufficient to justify the issuance of the warrant or was invalid, as claimed by Robish, we are bound by certain basic principles