United States v. Ira Alan Arias, 936 F.3d 793

Defendant Ira Alan Arias was tried and convicted by a jury on three counts of aggravated sexual abuse of a child based on an alleged assault of his minor niece, K.P., at a hotel during a wedding.
Government sought to admit prior-act sexual-assault testimony under Fed. R. Evid. 413; the district court excluded three proposed witnesses as too dissimilar and admitted two who described substantially similar facts (alcohol, isolation, force, early-morning assaults).
Before trial the district court denied defense requests to obtain K.P.’s psychotherapist/mental-health records (finding requests were speculative and protected by psychotherapist–patient privilege), but allowed questioning about any pre‑existing diagnoses.
During trial K.P. testified she had been diagnosed with anxiety and PTSD “after this incident”; defense moved for mistrial and for production of the mental‑health records—both motions were denied.
A government witness briefly mentioned that Arias had been under arrest for a parole violation; the court struck the remark and gave a curative instruction; defense moved for mistrial, which the court denied.
Arias was convicted and sentenced to concurrent 360‑month terms; on appeal the Eighth Circuit affirmed the rulings admitting Rule 413 evidence and denying mistrial for the parole comment, but remanded for an in camera review of K.P.’s mental‑health records to assess any Confrontation Clause error caused by her PTSD testimony.

Issue	Plaintiff's Argument (Arias)	Defendant's Argument (Government)	Held
Admission of prior sexual‑misconduct testimony under Fed. R. Evid. 413	Prior acts were not sufficiently similar and were unfairly prejudicial under Rule 403	District court properly balanced relevance and prejudice; Rule 413 favors admission of similar sexual‑offense evidence	Affirmed: admission of two witnesses was not an abuse of discretion
Mistrial for witness statement about prior incarceration/parole violation	Blurted comment violated in limine order and warranted mistrial	Court promptly struck comment and gave curative instruction; any prejudice cured	Affirmed: denial of mistrial was not an abuse of discretion
Mistrial / Confrontation Clause re: testimony that K.P. was diagnosed with PTSD after the assault	Allowing PTSD testimony while denying access to her mental‑health records prevented effective cross‑examination under the Sixth Amendment	Pretrial denial of records was permissible; testimony about mental health was limited and defense could cross‑examine without records	Reversed in part and remanded: district court erred by not striking/withholding PTSD testimony without permitting record review; remand for in camera review of records to determine harmlessness

United States v. Gabe, 237 F.3d 954 (8th Cir.) (Rule 413 permits prior‑sexual‑offense evidence to show propensity and may be admissible unless unfairly prejudicial)
United States v. LeCompte, 131 F.3d 767 (8th Cir.) (Rule 413 evidence should be admitted unless probative value is substantially outweighed by unfair prejudice)
United States v. Never Misses A Shot, 781 F.3d 1017 (8th Cir.) (Rule 413 does not require prior acts be nearly identical)
Pennsylvania v. Ritchie, 480 U.S. 39 (1987) (plurality) (Confrontation Clause does not compel pretrial discovery from third‑party files; distinction between trial confrontation rights and discovery)
Delaware v. Fensterer, 474 U.S. 15 (1985) (per curiam) (Confrontation Clause protects opportunity for effective cross‑examination and limits restrictions on its scope)
United States v. Lapsley, 263 F.3d 839 (8th Cir.) (remand for in camera review where disclosure may be essential to a fair determination)
United States v. Garcia, 562 F.3d 947 (8th Cir.) (remand for district court in camera review to assess potential Brady/Giglio material)
United States v. Holy Bull, 613 F.3d 871 (8th Cir.) (appellate standard: evidentiary rulings reviewed for abuse of discretion)