State v. Leiva-Perez, 391 P.3d 287

Victim found dead in locked trailer with severe blunt-force injuries; metal bar recovered in trailer and Victim’s truck was missing; Leiva-Perez located in California and arrested.
During a ~95-minute, Spanish-interpreted interview, officers confronted Leiva-Perez with evidence (denying any EMS response) and suggested they believed he was involved.
Officers used tactics including urging truthfulness, implying cooperation could lead to lesser consequences, and employing a limited false-friend approach; Leiva-Perez then admitted hitting Victim with a metal bar and wrote a statement.
Leiva-Perez argued at a suppression hearing that cultural background, limited education, and mistrust of police (including belief that promises about judges are credible in Guatemala) made him susceptible to coercion. An expert testified on Guatemalan perceptions of police/judges.
Trial court denied suppression, finding interrogation length, tone, lack of excessive deception, and no evidence of mental or cognitive incapacity weighed against coercion.
Jury convicted Leiva-Perez of first-degree murder; he appealed arguing his confession was coerced under the Fifth and Fourteenth Amendments.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether confession was coerced (Voluntariness under the Fifth/Fourteenth Amendments)	Leiva-Perez: officers’ threats of worse punishment, promises of leniency, false-friend technique, and his cultural/educational vulnerability overbore his will	State: interrogation was short, not unduly persistent or deceptive; promises/threats were vague; no evidence officers knew of or exploited cultural beliefs or cognitive deficits	Court affirmed: confession voluntary under totality of circumstances; no coercive police activity that overbore his will and no causal link between alleged threats and confession

Mabe v. State, 864 P.2d 890 (Utah 1993) (standards for reviewing voluntariness of confession)
Arizona v. Fulminante, 499 U.S. 279 (U.S. 1991) (ultimate voluntariness is a legal question)
State v. Rettenberger, 984 P.2d 1009 (Utah 1999) (false-friend technique and coercion analysis; defendant susceptibility)
Colorado v. Connelly, 479 U.S. 157 (U.S. 1986) (coercive police activity is necessary predicate for involuntary confession; defendant mental state relevant only as it affects susceptibility)
Malloy v. Hogan, 378 U.S. 1 (U.S. 1964) (Fifth Amendment protection applies to states via Fourteenth Amendment)
State v. Montero, 191 P.3d 828 (Utah Ct. App. 2008) (shorter lengthy interrogations and police challenges to suspects’ accounts not inherently coercive)
State v. Bunting, 51 P.3d 37 (Utah Ct. App. 2002) (false-friend technique and assurances of leniency may not render confession involuntary absent susceptibility)
State v. Strain, 779 P.2d 221 (Utah 1989) (officers’ representation they'll report cooperation is not coercive)
State v. Galli, 967 P.2d 930 (Utah 1998) (exaggerations of government knowledge do not automatically overbear will)