Should Utah courts routinely admit eyewitness expert testimony? State v. Clopten Explained

In State v. Clopten, the Utah Supreme Court fundamentally changed how trial courts should approach expert testimony about eyewitness identification reliability, eliminating a longstanding presumption against such testimony.

Background and Facts

Deon Clopten was convicted of first-degree murder for shooting Tony Fuailemaa outside a Salt Lake City nightclub. The State’s case relied heavily on eyewitness testimony, as there was no strong physical or forensic evidence. Clopten sought to introduce expert testimony from Dr. David Dodd regarding factors affecting eyewitness accuracy, including cross-racial identification, stress impact, weapon focus, and suggestive police procedures. The trial court excluded this testimony, reasoning that a Long instruction adequately addressed eyewitness reliability issues.

Key Legal Issues

The central issue was whether expert testimony regarding eyewitness identification reliability should be presumed admissible when timely requested. The court examined whether Utah’s historical approach—which created a de facto presumption against such testimony while favoring cautionary jury instructions—remained viable given extensive empirical research demonstrating the limitations of eyewitness memory.

Court’s Analysis and Holding

The court held that expert testimony regarding eyewitness identification should be admitted whenever it meets Utah Rule of Evidence 702 requirements. The court found that in cases where eyewitnesses identify strangers and established accuracy-affecting factors are present, such testimony both assists the trier of fact and meets reliability standards. The court noted that cautionary instructions alone are insufficient substitutes for expert testimony, as empirical research demonstrates their limited effectiveness in educating juries about eyewitness fallibility.

Practice Implications

This decision significantly expands opportunities for criminal defendants to challenge eyewitness testimony through expert witnesses. Defense attorneys should prepare expert testimony addressing specific factors present in their cases, such as stress, lighting conditions, cross-racial identification, or weapon focus. The court expects trial courts will “routinely admit” such testimony in stranger identification cases, marking a substantial shift from prior practice that favored exclusion.