When does trial counsel's failure to challenge expert testimony constitute ineffective assistance? Landry v. State Explained

The Utah Court of Appeals recently addressed a significant issue for criminal defense practitioners: when does trial counsel’s failure to challenge expert testimony constitute ineffective assistance of counsel? In Landry v. State, the court reversed a postconviction dismissal, finding that layered ineffectiveness by both trial and appellate counsel prejudiced the defendant.

Background and Facts

Herbert Landry was convicted of aggravated arson after his apartment caught fire shortly after he left. The State’s case relied heavily on expert testimony about fire patterns and accelerant detection canine alerts. Oscar, a certified detection dog, alerted to three locations in Landry’s bedroom and to his sock and shoe at a motel. However, laboratory testing found no ignitable substances on the clothing items, and the only substance detected in the bedroom was heptane—a construction adhesive the State conceded did not cause the fire.

Key Legal Issues

Landry’s postconviction petition raised a theory of layered ineffective assistance: appellate counsel was ineffective for failing to raise trial counsel’s ineffectiveness. The claimed deficiencies included trial counsel’s failure to object to uncorroborated canine alerts under State v. Schultz and failure to consult with an independent arson expert despite lacking experience in arson cases.

Court’s Analysis and Holding

The court found trial counsel’s performance objectively unreasonable on two grounds. First, failing to object to testimony about Oscar’s uncorroborated alerts to the clothing violated Schultz, which requires either laboratory corroboration or satisfaction of the expert testimony test for accelerant detection evidence. Second, trial counsel’s failure to engage her own expert was unreasonable given her inexperience with arson cases and the critical role of expert testimony in the State’s case.

The court applied the Strickland standard and found prejudice because the errors had a “pervasive effect” on the evidence. Expert testimony in the postconviction hearing revealed substantial flaws in the State’s investigation, and the jury had initially deadlocked, suggesting this was a close case.

Practice Implications

This decision reinforces several critical practice points. Defense counsel must investigate and challenge expert testimony even when pursuing alternative theories, as these defenses can be complementary rather than contradictory. In cases involving novel or contested scientific evidence like accelerant detection dogs, counsel should research applicable precedent like Schultz. Most importantly, when handling complex criminal cases outside one’s expertise, consulting with independent experts is not just advisable—it may be constitutionally required to provide competent representation.