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949 N.W.2d 395
S.D.
2020
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Background

  • Victim K.S., diagnosed with Benson’s Syndrome (dementia), lived in a dementia care facility and had significant cognitive and functional impairments by late 2016.
  • On November 18, 2016, Roger Jackson — who visited K.S. at the facility despite family restrictions — took her off campus for about two hours; staff later found discharge in her adult undergarment.
  • A sexual assault exam and lab testing found seminal fluid in K.S.’s undergarment; DNA testing did not exclude Jackson as the source. Jackson gave varying statements admitting some sexual contact but claiming impotence and uncertainty about penetration.
  • Jackson was indicted for third-degree rape under SDCL 22-22-1(3) (sexual penetration of a person incapable of consenting due to physical or mental incapacity), pled not guilty, and filed pretrial motions including a due-process dismissal claim based on the State’s failure to interview K.S.
  • The circuit court denied dismissal, limited certain expert testimony (Daubert hearing), denied a last-minute continuance to call an additional expert, and a jury convicted Jackson; he appealed.

Issues

Issue Plaintiff's Argument (State) Defendant's Argument (Jackson) Held
1. Motion to dismiss for failure to interview victim (due process) Denial proper; State’s failure to interview did not show bad faith and medical/staff records provided comparable evidence Failure to interview deprived Jackson of material exculpatory evidence; dismissal or hearing required Denied. Evidence was at most "potentially useful"; no bad faith; no dismissal required
2. Whether knowledge is an element of SDCL 22-22-1(3) Knowledge not required; Schuster controls; statute treats incapacity like statutory rape exceptions Jackson urged revisiting Schuster and argued Jones supports a knowledge/awareness element Affirmed. Knowledge is not an element under subsection (3); Schuster remains controlling
3. Exclusion/limitation of defense expert (Dr. Swenson) Court properly excluded speculative or non‑reliable opinions about capacity-to-consent to sex and limited timeframe under Daubert/SDCL 19-19-702 Restrictions prevented meaningful expert support that K.S. might have had capacity; testimony on what questions should have been asked was critical No abuse of discretion. Court reasonably limited testimony as unreliable, confusing, or cumulative
4. Denial of continuance to call State’s withdrawn expert (Dr. Cherry) Continuance unnecessary; Cherry’s expected testimony would have been cumulative and not exculpatory Late disclosure and State’s misrepresentation prejudiced defense; continuance needed to secure Cherry No abuse of discretion. Testimony would be cumulative of Dr. Swenson; defendant failed to show materiality or due diligence

Key Cases Cited

  • California v. Trombetta, 467 U.S. 479 (limits on government duty to preserve evidence; materiality and reasonably available comparable evidence required)
  • United States v. Valenzuela-Bernal, 458 U.S. 858 (due process claim for lost access to witnesses; materiality requirement applies)
  • Brady v. Maryland, 373 U.S. 83 (suppression of material, favorable evidence violates due process)
  • Arizona v. Youngblood, 488 U.S. 51 (for potentially useful evidence, defendant must show bad faith by government)
  • Daubert v. Merrell Dow Pharms., 509 U.S. 579 (standard for admissibility of expert scientific testimony)
  • State v. Schuster, 502 N.W.2d 565 (S.D. 1993) (knowledge not an element of rape where victim incapable of consenting due to mental/physical incapacity)
  • State v. Jones, 804 N.W.2d 409 (S.D. 2011) (distinguishes intoxication-based rape statute; requires proof defendant knew or reasonably should have known victim’s incapacity to consent due to intoxication)
  • United States v. Agurs, 427 U.S. 97 (Brady materiality standard)
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Case Details

Case Name: State v. Jackson
Court Name: South Dakota Supreme Court
Date Published: Sep 16, 2020
Citations: 949 N.W.2d 395; 2020 S.D. 53; 28800
Docket Number: 28800
Court Abbreviation: S.D.
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