State v. Beauvais, 322 P.3d 1116

Schuman, J. procedural posture: defendant charged with one count of first‑degree sexual abuse and two counts of attempted first‑degree sexual abuse based on conduct with J and K.
Motion in limine sought to exclude KIDS Center witnesses; argued Southard bars a diagnosis of sexual abuse and Lupoli prohibits indirect vouching; motion denied.
Midtrial, charges related to J were dismissed; defendant ultimately convicted of one count of first‑degree sexual abuse involving K.
K had a medical exam showing acute genital injuries consistent with alleged abuse; six weeks later KIDS Center interviews emphasized consistency, spontaneity, sensory details, and multi‑media disclosure.
Kyriakos diagnosed K as sexually abused; the State relied on corroborative physical findings; defense challenged admissibility under Southard/Lupoli; court applies Ovendale criteria for corroboration.
Charges involving J and K were joined for trial; later dismissal of J counts raised severance/mistrial issues; court upheld joinder and denied mistrial request.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Admissibility of Kyriakos’s sexual‑abuse diagnosis	Southard requires exclusion absent physical evidence; diagnosis supported by corroborating findings.	Diagnosis based primarily on credibility; physical findings not diagnostic; should be excluded under Southard/Lupoli.	Admissible; corroborative physical findings meet Ovendale criteria.
Admissibility of subsidiary principles testimony (Zancanella/Glesne/Kyriakos)	Testimony explains basis for diagnosis and credibility; aids jury.	Testimony amounts to indirect vouching; should be excluded under Lupoli when diagnosis is inadmissible.	Admissible; when properly contextualized, does not amount to impermissible vouching given corroborated diagnosis.
Joinder of J and K and potential prejudice	Joinder permitted; evidence of separate incidents admissible for nonpropensity purposes.	Joinder caused substantial prejudice; risk of cross‑influence.	No substantial prejudice; proper joinder under ORS 132.560(1).
Mistrial after dismissal of J counts	Mistrial warranted due to prejudice from lingering J evidence.	No substantial prejudice from dismissal.	No abuse of discretion; mistrial not warranted.
Pro se sentencing challenge			Rejection of sentencing challenge.

State v. Southard, 347 Or 127 (2009) (admissibility of expert sexual‑abuse diagnosis absent physical evidence; 403 balancing)
State v. Lupoli, 348 Or 346 (2010) (vouching concerns; subsidiary principles admissible with limitations when physical evidence supports diagnosis)
State v. Ovendale, 253 Or App 620 (2012) (corroboration criteria for physical evidence supporting diagnosis of abuse)
State v. Preuitt, 255 Or App 215 (2013) (limits on expert credibility comments even with admissible diagnosis)
State v. Miller, 327 Or 622 (1998) (nonpropensity evidence admissible when joined for trial; proper prejudice analysis)
State v. Middleton, 294 Or 427 (1983) (recognition that experts may aid juries without direct credibility statements)