State v. Combest, 350 P.3d 222

Defendant shared files (using eMule on the eDonkey peer-to-peer network) that included child pornography; law enforcement used Shareaza LE to locate and download two suspect files and logged associated metadata (IP address, GUID, hash, date/time).
Shareaza LE automates keyword searches, filters results by NCMEC-known hash values for child pornography, narrows results to IP addresses in a geographic jurisdiction, and downloads files from a single identified GUID.
Officers used the IP address from the downloaded files to subpoena the ISP, obtained the subscriber identity and address, secured a warrant, then seized defendant’s computer; forensic analysis matched the GUID and found additional child-pornography files and search history.
Defendant moved to suppress all evidence, arguing Shareaza LE’s automated monitoring and logging was a warrantless “search” under Article I, section 9 of the Oregon Constitution (analogizing to GPS/thermal surveillance and complaining of pervasive, non-human surveillance).
The trial court denied suppression; defendant entered conditional guilty pleas and appealed, preserving the search issue.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether using Shareaza LE to identify and download shared files and obtain IP/GUID/hash constituted a "search" under Article I, § 9	State: No protected privacy interest — defendant publicly exposed files and associated metadata by sharing them on the peer-to-peer network, so police obtained only what any user could.	Defendant: Software effectuated pervasive, automated surveillance and logging of internet activity (minute-by-minute), enabling targeted identification and tracking; thus it invaded privacy and required a warrant.	Court: Not a search — police obtained the same information available to other network users and conducted targeted downloads of shared files, not pervasive surveillance.
Whether the use of advanced/automated technology changes the constitutional analysis	State: Technology does not change outcome; relevant question is whether police observed what would otherwise be unobservable.	Defendant: Automation and scale of Shareaza LE make the intrusion akin to Campbell-style continuous tracking or other technology-deemed searches.	Court: Use of more efficient technology does not automatically make conduct a search; meaningful inquiries are whether information was materially different from what was publicly exposed and whether surveillance was pervasive — here it was not.

State v. Campbell, 306 Or. 157 (transmitter enabling pervasive location tracking was a search)
State v. Wacker, 317 Or. 419 (use of enhanced optics to observe activity that was publicly exposed was not a search)
State v. Meredith, 337 Or. 299 (privacy-invasion test under Article I, § 9; distinguishes Campbell’s pervasive surveillance)
State v. Howard/Dawson, 342 Or. 635 (expectation of privacy not solely determined by subjective expectation)
State v. Smith, 327 Or. 366 (technological enhancements do not automatically create a search)
U.S. v. Borowy, 595 F.3d 1045 (9th Cir.) (peer-to-peer shared files are not protected under Fourth Amendment; targeted search of publicly exposed info permissible)