This case was remanded for further consideration in light of State v. Atkinson, 298 Or 1, 688 P2d 832 (1984), and State v. Perry, 298 Or 21, 688 P2d 827 (1984). State v. Rounds, 298 Or 36, 688 P2d 843 (1984). On our first consideration of this appeal, we affirmed the trial court’s denial of defendant’s motion to suppress. State v. Rounds, 69 Or App 229, 685 P2d 463 (1984). We now conclude that the trial court erred in denying defendant’s motion and reverse and remand the case for a new trial.
Defendant was in Garibaldi during the “Garibaldi Days” festival in July, 1982. Defendant went to his grandfather’s home, tried the doors1 and, finding no one home, left his backpack leaning against a woodpile in the carport, which was open on two sides. A neighbor observed that activity and reported it to the sheriffs department, in accordance with defendant’s grandfather’s instruction to report the presence of strangers when the grandfather was not home.
When the officer arrived, the neighbor again conveyed his observations and described defendant. He also informed the officer that defendant had returned to his backpack at least once after placing it in the carport and had been present about 15 minutes before the officer arrived. The officer then checked all the doors and windows and the grounds and did not find any evidence of attempted forced entry or burglar tools. By that time, two other police officers and the deputy district attorney had arrived. At this point, they “attempted to secure some identification from the backpack [to see] who it belonged to.” The backpack was “closed” with a “flap over the top holding it secure.” The officers opened the backpack and removed a sleeping bag. Then they noticed and removed from the backpack a cigarette box which lay on top of clothes and other belongings. They opened the cigarette box, despite the officer’s acknowledgment that he had “very seldom” found identification inside a cigarette box. Inside this box they saw “some white stickers,” which they suspected to be LSD. Elsewhere in the backpack they found *151two bank books, one bearing defendant’s name. The officers then seized the backpack and obtained a search warrant. A subsequent search of the backpack did not reveal any other incriminating evidence.
Defendant moved to suppress the evidence seized during the initial inspection of his backpack, arguing that both the initial entry into the backpack and the opening of the cigarette box were illegal searches under Article I, section 9, of the Oregon Constitition and the Fourth and Fourteenth Amendments to the United States Constitution.2 The trial court denied the motion, finding that “defendant did not exhibit an expectation of privacy [in the backpack]; nor did he objectively have one which society should recognize.”
The “expectation of privacy” test is derived from Justice Harlan’s concurring opinion in Katz v. United States, 389 US 347, 88 S Ct 507, 19 L Ed 2d 576 (1967).3 The test is applied to determine whether there has been a “search” within the meaning of the Fourth Amendment, subject to constitutional restraint. It was developed when police investigatory powers were being strengthened through technological advances, so that the traditional equating of a “search” with a physical trespass to real or personal property was inadequate. In Katz, the Supreme Court held that:
*152“* * * [t]he Government’s activities in electronically listening to and recording the petitioner’s words violated the privacy upon which he justifiably relied while using the telephone booth and thus constituted a ‘search and seizure’ within the meaning of the Fourth Amendment. * * *” 389 US at 353.
Oregon courts have applied the Katz test as a thresh-hold question to determine whether government activities constitute a search and seizure within the protection of the Fourth Amendment to the United States Constitution. The cases in which it applied involve areas which do not fit neatly within the constitutional protection of “persons, houses, papers, and effects.” See, e.g., State v. Holt, 291 Or 343, 630 P2d 854 (1981) (observation in a public restroom held not a search); State v. Carter/Burton, 54 Or App 852, 636 P2d 460 (1981) (observation in an open field held an illegal search); State v. Goude, 49 Or App 721, 620 P2d 957 (1980), rev den 290 Or 651 (1981) (examination of car parked in private driveway held an illegal search). On the other hand, Oregon courts have not felt the need to resort to the test in cases involving personal effects, which are within the express protection of the constitution: luggage, State v. Perry, supra; a purse, State v. Newman, 292 Or 216, 637 P2d 143 (1981), cert den 457 US 1111 (1982); and a fishing tackle box, State v. Keller, 265 Or 622, 510 P2d 568 (1973).
Oregon courts have not yet applied the Katz “expectation of privacy” test under Article I, section 9, of the Oregon Constitution, and we do not think it necessary to do so in the present case, because this case involves a physical trespass to a personal effect expressly entitled to constitutional protection. The pack was a closed opaque container whose contents were not visible from the outside, and it was used to carry personal effects, as are suitcases and purses. There was no objective basis for the officer reasonably to think it had been abandoned, because it was left closed on private property and the officer knew that defendant had visited it as recently as 15 minutes before the officer’s arrival. The facts of this case are a far cry from those of State v. Grace, 26 Or App 927, 554 P2d 628 (1976), in which we held that the officer’s seizure of a spent shell casing, which lay in plain view in the defendant’s driveway for two days after the defendant had ejected it in the officer’s presence, was not constitutionally protected.
*153Having concluded that the officers’ entry into the backpack to identify its owner was a “search” subject to constititional protection, we must now consider whether the search was “reasonable.”4 We are guided in this determination by the opinions in State v. Atkinson, supra, and State v. Perry, supra.
The search in Atkinson was a police inventory of the contents of an impounded automobile. The Supreme Court held that, for a noncriminal, nonemergency search to be reasonable under the Oregon Constitution, (1) the personal property must lawfully be in police custody, and (2) the search
“* * * must be conducted pursuant to a properly authorized administrative program, designed and systematically administered so that the inventory involves no exercise of discretion by the law enforcement person directing or taking the inventory. * * *” 298 Or at 10.
A third requirement is that the scope of the search be reasonable in relation to its purpose. That case was remanded for further proceedings addressing those three issues.
Perry involved an inventory of luggage belonging to an intoxicated man temporarily in police custody for detoxificaton. The police opened the defendant’s suitcase and discovered marijuana. The Supreme Court reversed the defendant’s conviction for possession of a controlled substance, holding that it was unreasonable to open the suitcase. Under State v. Keller, supra, absent probable cause, the police cannot open a closed container during an inventory of items belonging to a person arrested for a crime. The court in Perry held that, because a person in a civil hold situation is entitled to at least as great an expectation of privacy as a person in a criminal case, the search was unreasonable. 298 Or at 28. This court recently applied these decisions in State v. Ridderbush, 71 Or App 418, 426, 692 P2d 667 (1984), holding that it is unreasonable for police to open a closed container during an inventory of items belonging to a person in custody on a criminal charge.
*154 Although Atkinson and Perry involved inventory situations, we think that their holdings apply to any noninvestigative, nonemergency search, such as the search for identification of the owner of a backpack. We do not need to consider whether the first two criteria of Atkinson were satisfied, because we conclude that the scope of the search was unreasonable as a matter of law. Recognizing the different purposes of an inventory of personal property in police custody as a result of a detention of a person and the search for identification of the owner of personal property, such as the backpack in this case, we shall assume, without deciding, that it was reasonable for the police to open the backpack; however, Perry and Ridderbush require us to hold that it was unreasonable to open the cigarette box in a search for identification.
In our former opinion in this case, the majority wrote:
«* * * The court made no findings relating to any ‘search’ of the closed cigarette box, nor is any challenge made on this appeal regarding the propriety of opening that container to examine its contents. Thus, this case does not present a ‘closed container’ issue. * * *” 69 Or App at 232.
The trial court, in finding that defendant did not have an actual expectation of privacy which society is prepared to recognize as reasonable, ruled that the- inspection of the backpack was not a “search” subject to constitutional restriction. In reaching that decision, it foreclosed discussion of whether the search was reasonable.5 Because we hold that the search of the backpack was subject to constitutional limitations, we need to go farther than the trial court did to determine the reasonableness of the search. We now conclude *155that defendant adequately raised the issue of the impropriety of opening the cigarette box for our consideration on this appeal. See State v. Rounds, supra, 69 Or App at 239 n 2 (Warren J., dissenting).
Perry and Ridderbush establish the principle that, in a noninvestigative, nonemergency situation, it is unreasonable for an officer to open a closed container. In this case, defendant, who was not suspected of a crime when the officers entered his backpack, is entitled to at least as much constitutional protection as a person charged with a crime, State v. Ridderbush, supra, and a person in a civil hold, State v. Perry, supra. Because the officer’s opening the cigarette box was unreasonable, defendant’s motion to suppress the evidence found therein should have been granted.
Reversed and remanded for new trial.
Although the officer testified on direct examination that he was told that defendant had tried all the doors, he admitted on cross-examination that the neighbor said that defendant “just tried the front door.”
Article I, section 9, of the Oregon Constitution, provides, in pertinent part:
“No law shall violate the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable search, or seizure; and no warrant shall issue but upon probable cause * *
The Fourth Amendment to the U.S. Constitution provides, in pertinent part:
“The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause * *
Under State v. Kennedy, 295 Or 260, 666 P2d 1316 (1983), we must consider the state constitutional claim first.
In Katz v. United States, 389 US 347, 361, 88 S Ct 507, 19 L Ed 2d 576 (1967), Justice Harlan stated:
“As the Court’s opinion states, ‘the Fourth Amendment protects people, not places.’ The question, however, is what protection it affords to those people. Generally, as here, the answer to that question requires reference to a ‘place.’ My understanding of the rule that has emerged from prior decisions is that there is a twofold requirement, first that a person have exhibited an actual (subjective) expectation of privacy and, second, that the expectation be one that society is prepared to recognize as ‘reasonable.’ * * *”
If the search had been conducted in pursuit of a criminal investigation, it would also be subject to the constitutional probable cause and warrant requirements. South Dakota v. Opperman, 428 US 364, 370 n 5, 96 S Ct 3092, 49 L Ed 2d 1000 (1976); State v. Newman, 49 Or App 313, 317, 619 P2d 930 (1980), reversed on other grounds 292 Or 216, 637 P2d 143 (1981), cert den 457 US 1111 (1982).
The former majority opinion in this case misconstrued the relevance of the Katz test in writing:
“* * * Traditionally, a two-part ‘expectation of privacy’ test has been applied to determine whether a search violates the protections of the Fourth Amendment: (1) whether defendant had a subjective expectation of privacy in his backpack; and (2) whether that expectation is one which society is prepared to recognize as reasonable. See Katz v. United States, [supra, 389 US at 361]. This test has been applied to analyze the constitutionality of searches under Article I, section 9, as well. See State v. Holt, 291 Or 343, 630 P2d 854 (1981). * * *” 69 Or App at 234. (Emphasis supplied; footnote omitted.)
As noted in this opinion, the Katz test is applied to determine whether an action is a “search” subject to constitutional limitations, not to determine if a search is reasonable and lawful.