2021 CO 70
Colo.2021Background
- Victim (K.J.) entered a sexual relationship with Dylan Coons beginning when she was 15; the relationship involved physical/sexual violence, coercion, blackmail with explicit photos, and a coercive written "contract."
- Prosecutors charged Coons with sexual assault, two counts of extortion, and third-degree assault, alleging the conduct constituted domestic violence.
- The People sought to admit generalized ("blind") expert testimony from Erica Laue about domestic-violence dynamics using the Power and Control Wheel to educate the jury about patterns of coercion, control, and counterintuitive victim behavior.
- The trial court admitted Laue's generalized testimony and the jury convicted Coons on all counts and found the acts to be domestic violence.
- A division of the court of appeals reversed, concluding portions of Laue's Power and Control Wheel testimony (examples not tied to the case facts) did not "fit" and were therefore inadmissible; the People petitioned for certiorari.
- The Colorado Supreme Court reversed the court of appeals, adopting a flexible fit standard for generalized expert testimony: admissible if it has a sufficient logical connection to the case to be helpful to the jury and survives CRE 403; trial court's decision was not an abuse of discretion here.
Issues
| Issue | Plaintiff's Argument (People) | Defendant's Argument (Coons) | Held |
|---|---|---|---|
| Admissibility of generalized ("blind") expert testimony — how strict must the "fit" be? | Laue's Power and Control testimony was necessary to contextualize prolonged manipulation/coercion and was helpful to the jury. | Generalized testimony was irrelevant where many examples cited had no logical relation to the specific facts and risked prejudicing the jury. | Generalized expert testimony must have a sufficient logical connection to factual issues to be helpful and must pass CRE 403; the fit need not be perfect. Trial court's admission here was within discretion. |
| Prejudice / Harmless error — did admission require reversal? | Any error was harmless because the testimony was background, the prosecutor and expert disclaimed case-specific opinion, jurors were instructed, and most spokes of the Wheel fit the facts. | Admission risked jury inferring uncharged or future-danger facts (e.g., threats to kill) and could have improperly influenced verdicts. | No record basis that jurors drew improper inferences; trial protections (disclaimer, cross-exam, instructions, CRE 403) reduced prejudice; division's reversal was erroneous. |
Key Cases Cited
- People v. Rector, 248 P.3d 1196 (Colo. 2011) (abuse-of-discretion standard for admission of expert testimony)
- People v. Martinez, 74 P.3d 316 (Colo. 2003) (helpfulness hinges on whether expert testimony "fits" the particular case)
- Galvan v. People, 476 P.3d 746 (Colo. 2020) (presumption that juries follow court instructions)
- People v. Trujillo, 83 P.3d 642 (Colo. 2004) (principles on jury instructions and reliance on evidence)