State v. McNutt, 463 P.3d 563

Background

Detectives investigating BitTorrent (a P2P file‑sharing network commonly used to trade child pornography) identified a computer associated with torrents of investigative interest and directly downloaded files from it.
Two explicitly titled files downloaded from that computer were: “Cp 9Yo Dad Cum Face Dee And Desi Zadoom Pedo Cumshot 9.mpg” and “11yo - girl - Preteen girl just wants to Fuck & Suck (Sound).avi.”
Over a ~30‑day period the detectives downloaded ~300 files from the same IP address; later the IP was traced to defendant McNutt’s home in Washington County.
Detective Kiurski (400+ hours training, 5 years on child‑abuse investigations) briefly viewed some of the downloaded files and stated they contained child pornography in violation of ORS 163.684 and ORS 163.686.
A magistrate issued a warrant to search/seize electronic devices at defendant’s home; defendant moved to suppress, arguing the affidavit failed to establish probable cause that files on his computer were child pornography. The trial court granted suppression; the state appealed and the Court of Appeals reversed and remanded.

Issues

Issue	Plaintiff's Argument	Defendant's Argument	Held
Did the affidavit establish probable cause under Article I, §9 that files on the home computer were child pornography?	Affidavit showed two graphic filenames, an experienced detective’s on‑site view concluding files were child pornography, and use of BitTorrent (a network often used to trade child pornography) — together these facts supported probable cause.	Affidavit was conclusory; it needed copies or specific descriptions of images or additional corroborating circumstances to permit a magistrate to independently conclude files depicted sexually explicit conduct by children.	Reversed suppression: totality of circumstances (file names, Kiurski’s assessment, and network context) supplied probable cause under Article I, §9.
Did the affidavit satisfy the Fourth Amendment probable‑cause standard?	Same factual mix gave a substantial basis for magistrate’s finding; experienced officer’s conclusion carries weight given Oregon’s statutory definitions of prohibited conduct.	The affidavit contained a "bare conclusion" that files were child pornography and was insufficient under Fourth Amendment precedents requiring more particularized description.	Affirmed that affidavit provided a substantial basis for probable cause under the Fourth Amendment (court relied on analogous federal circuit decisions).
Was an officer’s subjective conclusion that files were child pornography entitled to weight?	An experienced detective’s objective assessment that files depicted statutory categories of sexually explicit conduct is entitled to significant weight and can corroborate other facts.	Such assertions are subjective and should be given little weight absent more detailed descriptions.	Court held the officer’s conclusion, grounded in training and actual viewing of files, was probative and properly considered alongside file names and network use.
Was the warrant sufficiently particular under State v. Mansor? (raised on appeal)	— (state argued warrant and affidavit identified the ‘‘what’’ sought: visual recordings of sexually explicit conduct involving children)	Warrant failed Mansor: lacked particular description of what to find, temporal limits, and limits on use of discovered information.	Court declined to affirm on that alternative ground: held ‘‘what’’ was sufficiently described; temporal and post‑search use issues were not adequately developed in the record, so Mansor challenges were not resolved.

Key Cases Cited

State v. Mansor, 363 Or 185 (discusses specificity required for computer search warrants)
State v. Foster, 350 Or 161 (probable‑cause standard: probability, commonsense assessment)
United States v. Miknevich, 638 F.3d 178 (3d Cir.) (graphic filename plus other facts can support probable cause)
United States v. Haymond, 672 F.3d 948 (10th Cir.) (filenames and agent’s view supported probable cause)
United States v. Brunette, 256 F.3d 14 (1st Cir.) (must describe lasciviousness with detail under certain federal tests)
United States v. Doyle, 650 F.3d 460 (4th Cir.) (generic ‘‘nude children’’ description insufficient)
United States v. Pavulak, 700 F.3d 651 (3d Cir.) (distinguishes eyewitness coworker reports from officer’s forensic view)
United States v. Grant, 490 F.3d 627 (8th Cir.) (third‑party report of child pornography on a computer may suffice)
Massachusetts v. Upton, 466 U.S. 727 (review asks whether affidavit viewed as whole provided a substantial basis for magistrate’s finding)
State v. Tropeano, 238 Or App 16 (prior Oregon case on sufficiency of affidavit for child‑pornography searches)