State v. McNall, 476 P.3d 1259

Background

On April 9, 2016, an explosion destroyed defendant Michael McNall’s home shortly after he left the property; the home belonged to his stepmother.
State charged McNall with first‑degree arson (ORS 164.325) and attempted aggravated theft (insurance fraud theory).
Fire investigators concluded propane was the likely explosive, with the explosion originating at a garage gas line; a ball valve in the wreckage was found in the open position and contained pipe threads matching threads stripped from the gas line.
Investigators testified the valve and a missing gas‑line cap were most consistent with manual removal/opening, not an accidental leak; an expert estimated ~24 minutes to fill the garage with ignitable propane. McNall left the house about 22 minutes before the blast.
Additional evidence: McNall bought a new renter’s insurance policy two months earlier and had financial problems; McNall offered alternative explanations (he had used the line for a paint dryer; alleged company agents came to his house).
Jury convicted; McNall moved for judgment of acquittal claiming insufficient evidence of intentional causation; trial court denied; on appeal the court affirmed.

Issues

Issue	Plaintiff's Argument	Defendant's Argument	Held
Sufficiency to prove intentional causing of the explosion (arson & attempted aggravated theft)	Circumstantial evidence (propane origin, open/manual ball valve, missing cap, timing to fill garage, McNall last on scene, new insurance & financial distress) supports intent and identification of defendant	Evidence is circumstantial and does not prove he intentionally caused the explosion	Affirmed — a reasonable jury could infer intentional causation and McNall’s responsibility
Weight/necessity of motive evidence	Insurance purchase and financial distress provide motive to burn for proceeds	McNall argues motive implausible (claiming >$700k in possessions vs $300k policy)	Motive is not required; even if motive evidence was weak, other physical and temporal evidence sufficed
Alternative‑perpetrator theory	State presented testimony that the alleged company did not send agents that day and was unaware of McNall’s suit	McNall claimed company agents visited to serve papers and might have caused the blast	Jury not compelled to accept defendant’s alternate story; state evidence permitted rejection of that theory
Forensic link: open ball valve, pipe threads, and ignition source	Threads in valve matched stripped threads from line; experts said ignition source often unidentifiable in such blasts; valve in open position indicated manual action	No direct proof the valve was attached to the line at time of ignition or identification of any ignition source	Evidence was sufficient for jury to infer valve caused leak/ignition and that manual opening occurred; lack of identified ignition source is not fatal

Key Cases Cited

State v. Fields, 304 Or App 763 (defines standard for judgment of acquittal review)
State v. Simmons, 279 Or App 756 (procedure for resolving disputed and undisputed facts on sufficiency review)
State v. Hampton, 317 Or 251 (motive not required to prove intent)
State v. May, 257 Or App 375 (factfinder not required to accept defendant’s alternative explanation)
State v. Cunningham, 320 Or 47 (jury not compelled to accept defendant’s less incriminating version)
State v. Miller, 226 Or App 52 (appellate court must not reweigh evidence when sufficiency review permits reasonable inference of guilt)