State v. Arriaga-Luna, 311 P.3d 1028

Victim found shot to death; police suspected Delfino Arriaga-Luna after family members reported kidnapping and a boyfriend implicated him.
Arriaga-Luna was interviewed twice: first on April 6 (about 1–3 a.m.) with an English-led interview and Spanish interpreter; no confession resulted.
Detective Arenaz suggested consequences ("you’re not gonna see [your children]… locked in prison the rest of your life") while urging alternate explanations (implicate brother, accident).
Two days later Detective Hamideh, speaking Spanish and using a false-friend approach, appealed to Arriaga-Luna’s concern for his daughters, offered to help with "resources," and urged confessing to preserve dignity; Arriaga-Luna confessed within an hour.
Arriaga-Luna moved to suppress, arguing the confession was coerced by threats/promises regarding his children and by the false-friend technique; the district court granted suppression solely on the children-based coercion theory.
The State appealed; the Utah Supreme Court reversed, holding the confession voluntary under the totality of the circumstances and remanding for further proceedings.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether references to defendant’s children rendered confession involuntary	State: no per se rule; references aren’t coercive absent overcoming will	Arriaga-Luna: officers’ appeals to his children coerced confession (like Lynumn/Tingle)	Court: not coercive here; will not overborne under totality of circumstances
Whether promises/threats about sentence or custody were improper	State: officers gave realistic information about consequences, not conditional promises	Arriaga-Luna: suggestions ("you’re not gonna see them") were veiled threats to elicit confession	Court: statements were factual about possible consequences, not conditional inducements; not improper in context
Whether the false-friend technique made confession involuntary	State: technique alone doesn’t show involuntariness absent susceptibility or coercive promises	Arriaga-Luna: Hamideh’s rapport-building and offers constituted coercion	Court: defendant had no special vulnerability; technique did not render confession involuntary
Whether the State invited the district court’s error	State: N/A — prosecutor disagreed with court’s bright-line view in suppression hearing	Arriaga-Luna: prosecutor’s comments invited court’s erroneous ruling	Court: prosecutor did not invite error; she opposed the court’s view

Malloy v. Hogan, 378 U.S. 1 (constitutional protection against compelled self-incrimination)
United States v. Washington, 431 U.S. 181 (totality-of-circumstances test for overborne will)
Miller v. Fenton, 474 U.S. 104 (certain interrogation techniques may be so offensive as to invalidate confessions)
Arizona v. Fulminante, 499 U.S. 279 (threats/promises assessed under totality of circumstances)
Lynumn v. Illinois, 372 U.S. 528 (threats concerning children can render confession involuntary)
United States v. Tingle, 658 F.2d 1332 (officers preying on maternal instinct is improper influence)
State v. Rettenberger, 984 P.2d 1009 (Utah factors: interrogation details and suspect characteristics)
State v. Mabe, 864 P.2d 890 (causal connection required between coercion and confession)