OEC 601 Competency Is Witness-Wide: Courts May Not Exclude Testimony on a Specific Fact Based on Memory Quality

I. Introduction

State v. Benton, 375 Or 334 (Or 2026), arises from a homicide prosecution in which the state alleged that Lynn Edward Benton conspired with two others—Jaynes and Campbell—to kill Benton’s wife (DB). A central factual dispute concerned whether Jaynes left his job at a Chevron station during his shift on the day of the murder.

The state sought to call Smith, Jaynes’s coworker, who had given shifting accounts over time—initially confirming Jaynes did not leave work, later stating Jaynes left twice after pressurized police interviews and polygraphs, later disclaiming memory, and ultimately telling a state investigator in 2025 that he remembered Jaynes left but could not recall details.

Before retrial, Benton moved to exclude Smith’s testimony. Benton argued (among other grounds) that Smith was not competent under OEC 601 because suggestive interrogation tactics and other stressors had “destroyed” or contaminated Smith’s memory about whether Jaynes left work. The circuit court partially granted the motion—finding Smith generally competent to testify about other matters, but not competent to testify about the specific fact of Jaynes leaving work.

The state pursued an interlocutory appeal under ORS 138.045(1)(d), (2). While the appeal was pending, Benton pleaded guilty to first-degree manslaughter; the Supreme Court noted the appeal was not moot until sentencing.

II. Summary of the Opinion

The Oregon Supreme Court reversed. It held that OEC 601 competency concerns whether a person has the general capacity to be a witness at all (i.e., to perceive, recollect, and communicate), not whether the person can reliably recall a particular fact. Concerns about the quality or reliability of memory as to a specific matter are addressed through other evidentiary rules (e.g., OEC 602, OEC 403, and related doctrines), not through a topic-by-topic competency exclusion under OEC 601.

Because the trial court found Smith competent in general but incompetent only on the single issue of whether Jaynes left work, it applied the wrong legal standard under OEC 601. The case was remanded for further proceedings.

III. Analysis

A. Precedents Cited

  • State v. Milbradt, 305 Or 621, 756 P2d 620 (1988)
    The Court treated Milbradt as a key articulation of Oregon’s “liberal” witness-competency approach under OEC 601. There, witnesses with severe developmental disabilities were deemed competent despite “great difficulty recalling” details. Milbradt supported the principle that OEC 601 asks about basic capacities to perceive/recall/communicate, while credibility and detail deficiencies are for the jury.
  • State v. Sarich, 352 Or 601, 291 P3d 647 (2012)
    The Court used Sarich to clarify that competency focuses on whether the person can function as a witness in a general way. In Sarich, the witness’s communication limits were so severe that he could not answer most questions involving past events and abstract concepts, rendering him not competent. The Court rejected Benton’s reliance on Sarich as allowing competency to be decided “issue-by-issue”; rather, Sarich concerned categorical inability to testify usefully.
  • State v. Hightower, 361 Or 412, 393 P3d 224 (2017)
    Cited for the appellate framework: predicate legal determinations that guide a discretionary decision are reviewed for legal error. This reinforced the Court’s two-step review: correct standard first, then abuse of discretion if the standard is correct.
  • State v. Gaines, 346 Or 160, 206 P3d 1042 (2009) and PGE v. Bureau of Labor and Industries, 317 Or 606, 859 P2d 1143 (1993)
    Cited for statutory construction methodology: text and context first (as best evidence of legislative intent), then helpful legislative history. The Court deployed this framework to construe OEC 601 relative to OEC 602.
  • State v. Hickman, 355 Or 715, 330 P3d 551 (2014), modified on recons, 356 Or 687, 343 P3d 634 (2015)
    Used to explain OEC 602 as a “conditional relevance” foundation question typically suited for the jury once minimal support exists. This helped distinguish “competency to be a witness” (court gatekeeping under OEC 601/OEC 104(1)) from “personal knowledge of a matter” (foundation/conditional relevance under OEC 602/OEC 104(2)).
  • Equitable Life Assurance v. McKay, 306 Or 493, 760 P2d 871 (1988)
    Cited for Oregon’s broad policy: “ferreting out and discounting biased testimony” is generally for the jury (believability), not for exclusion (admissibility). The Court placed the trial court’s memory-quality concerns on the believability/admissibility side of that line.
  • State v. Cloutier, 351 Or 68, 261 P3d 1234 (2011)
    Cited for the interpretive principle that statutory construction is informed by the Court’s prior construction of the statute or its predecessors. This supported continuity in reading OEC 601 as a general competency rule.
  • State v. Blue, 374 Or 439, 580 P3d 826 (2025) and State v. Serrano, 346 Or 311, 210 P3d 892 (2009)
    Cited to justify reliance on the 1981 Conference Committee Commentary to the Oregon Evidence Code. The Court used the commentary to confirm OEC 601’s roots in common-law categorical disqualifications and the modern trend to treat many concerns as impeachment.
  • State v. Pace, 187 Or 498, 212 P2d 755 (1949); State v. Jensen, 70 Or 156, 140 P 740 (1914); State v. Jackson, 9 Or 457 (1881); State v. Stich, 5 Or App 511, 484 P2d 861 (1971)
    These cases appeared in the OEC 601 commentary and were noted by the Court as involving general competency attributes (age, mental capacity), reinforcing that OEC 601’s historic target is witness-wide qualification, not narrow topic-based admissibility.
  • State v. Lawson/James, 352 Or 724, 291 P3d 673 (2012)
    Although not applied on the merits here, the Court acknowledged Benton’s reliance on Lawson/James (addressing suggestive police procedures and reliability) and clarified that such arguments go to other rules (including OEC 403, OEC 602, OEC 701), not OEC 601. The Court expressly left those issues open because the trial court ruled only on OEC 601.
  • State v. Benton, 371 Or 311, 534 P3d 724 (2023)
    Referenced as the earlier reversal of Benton’s prior convictions (erroneous denial of suppression of statements to a jail informant), explaining the retrial posture.
  • In re J.H., 326 Or App 640, 533 P3d 363 (2023)
    Not a Supreme Court precedent, but central to the procedural story: the trial court said it was applying the test as stated in J.H.. The Supreme Court’s analysis effectively rejects the trial court’s use of that framing insofar as it permitted competency to be narrowed to a single factual issue.

B. Legal Reasoning

  1. OEC 601’s text sets a person-level threshold (“may be a witness”).
    The Court emphasized that OEC 601 speaks in terms of whether a “person” can “be a witness,” indicating a general qualification inquiry. Although recollection is implicit in the ability to “make known” perceptions (supported by the treatise discussion the Court quoted), the recollection component is about baseline capacity, not accuracy on a particular point.
  2. Context: OEC 601 versus OEC 602 (“may not testify to a matter”).
    The Court treated the contrast with OEC 602 as decisive context. OEC 602 is explicitly “matter”-specific and asks whether there is evidence sufficient to support a finding of personal knowledge of that matter. That structure assigns “topic-specific” admissibility problems (including whether the witness actually has personal knowledge or adequate recollection of a matter) to OEC 602 and related admissibility rules, not to OEC 601.
  3. OEC 601 is not a reliability screen for a single asserted fact.
    The trial court’s premise was that Smith’s memory of “whether Jaynes left work” had been “destroyed” by suggestive police tactics, head injuries, stressors, ADHD, and trauma, making him not “worthwhile” on that point. The Supreme Court held that—even if those concerns are serious—they are not properly implemented as a partial competency disqualification under OEC 601.
  4. History and policy: OEC 601 replaces categorical disqualifications with impeachment.
    The Court relied on the 1981 commentary explaining that many former incompetency grounds (interest, relationship, etc.) have been converted into credibility issues. That backdrop supports a “liberal competency” regime in which juries generally evaluate reliability, while courts reserve OEC 601 for true incapacity to function as a witness.
  5. Application to the record.
    Because the circuit court found Smith competent on other relevant matters but not on the single contested factual issue, it necessarily treated OEC 601 as permitting issue-by-issue competency rulings. That was legal error, requiring reversal without reaching other evidentiary grounds.

C. Impact

  • Clarifies the boundary between competency (OEC 601) and admissibility foundations (OEC 602) / reliability balancing (OEC 403).
    Trial courts may not use OEC 601 to exclude a generally competent witness from testifying about a specific fact due to memory degradation, contamination, interrogation pressure, or similar reliability concerns.
  • Rechannels “memory contamination” litigation into the correct evidentiary tools.
    Parties challenging testimony influenced by suggestive police methods must primarily litigate under other doctrines—particularly those referenced in State v. Lawson/James—rather than attempting to recharacterize the problem as partial incompetency.
  • Constrains pretrial “surgical” competency exclusions.
    The decision discourages orders that deem a witness competent generally but incompetent on a single historical fact. Going forward, courts should either find the person competent to testify as a witness (leaving subject-matter limits to other rules), or find the person not competent at all due to global incapacity to perceive/recollect/communicate.
  • Practical effect on criminal cases.
    In cases featuring evolving witness accounts after intense investigations, prosecutors and defendants can expect more disputes to be framed as: (a) personal-knowledge/foundation problems (OEC 602), (b) lay opinion boundaries (OEC 701), (c) unfair prejudice/misleading-the-jury balancing (OEC 403), and (d) impeachment—rather than OEC 601 exclusions.

IV. Complex Concepts Simplified

Competency (OEC 601)
A threshold question: does the person have basic ability to perceive events, remember enough to report them, and communicate answers? It is about whether the person can function as a witness at all—not whether the person is correct about a particular point.
Personal knowledge (OEC 602)
A topic-specific foundation: may the witness testify about this matter? The proponent must show enough evidence that a juror could find the witness had personal knowledge (observed it). Challenges that the witness doesn’t really know/remember that matter typically belong here.
Credibility vs. admissibility
Credibility concerns whether the jury should believe the witness (e.g., inconsistent statements, susceptibility to suggestion). Admissibility concerns whether the jury should hear it at all. Oregon’s liberal competency regime usually leaves credibility issues to the jury.
OEC 104(1) vs. OEC 104(2)
Under OEC 104(1), the judge decides preliminary questions such as witness qualification (competency). Under OEC 104(2), some issues are “conditional relevance” questions—e.g., whether there is evidence from which the jury could find a foundational fact (like personal knowledge).
Memory contamination / suggestive interrogation
These terms describe how questioning methods, pressure, repetition, and misinformation can alter what a person later reports. The Court did not decide how those concerns should be evaluated on this record; it held only that they do not justify excluding a single topic of testimony via OEC 601.

V. Conclusion

State v. Benton establishes a clear rule of Oregon evidence law: OEC 601 competency is a general, witness-wide determination. A trial court may not deem a witness competent overall yet incompetent to testify about a specific fact simply because the witness’s memory of that fact is poor, contaminated, or disputed. Those concerns must be handled under other evidence rules governing personal knowledge, relevance, prejudice, and the mechanics of proof.

The decision reinforces Oregon’s long-standing “liberal competency” approach and clarifies the proper analytical lanes for litigating reliability problems—particularly in cases involving suggestive investigative techniques—without converting OEC 601 into a selective reliability filter.