State of Minnesota v. Anthony James Cox, 884 N.W.2d 400

On Oct. 22, 2013 Anthony Cox entered Aaron Moran’s home during an armed robbery; Moran was shot four times and died. A 15‑year‑old nephew (B.M.) witnessed key events and later called 911.
Cox had armed himself (brought a loaded .357 magnum, extra rounds), practiced shooting, and wore a pistol‑grip glove on his trigger hand; he and an accomplice (Kurr) had earlier planned a similar robbery attempt.
At the scene Cox ordered B.M. to retrieve Moran’s wallet and searched it; he left after making B.M. count; police later arrested Cox with Moran’s phone, three .357 rounds, and B.M.’s backpack.
Cox was interviewed for nearly five hours at the police station; after initiating a negotiation (asking officers to “look into” his brother’s death) he confessed to killing Moran; he had been Mirandized and indicated he understood his rights.
Charged with first‑degree premeditated murder, two counts of first‑degree intentional felony murder, and first‑degree aggravated robbery; district court denied Cox’s motion to suppress his statement; jury convicted on the charged counts and the court imposed life without release for premeditated murder.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Voluntariness of confession	State: statement voluntary under totality; Cox initiated deal and understood rights	Cox: promises/offers by police (investigate brother’s death; influence prosecutor; jury leniency) overbore his will	Confession admissible — totality shows Cox initiated negotiation, understood Miranda, and was not coerced
Effect of officers’ promises to "look into" brother’s death	State: such a promise, in context, is not coercive and Cox named his own terms	Cox: promise was an improper quid pro quo that rendered statement involuntary	Court: distinguishable from coercive‑promise cases; Cox initiated and obtained the promise; voluntariness upheld
Officers’ statements about favorable view by prosecutors/juries	State: comments were predictions/encouragement, not promises of influence	Cox: such remarks constituted improper psychological coercion	Court: remarks were not improper promises and did not overbear Cox’s will
Sufficiency of evidence of premeditation	State: planning (weapon, gloves, practice), nature of the killing (pauses, chest wounds), post‑shooting conduct (theft, no aid) support premeditation	Cox: killing was impulsive during a robbery; planning evidence consistent with robbery only; pauses were seconds and consistent with frustration	Court: circumstances viewed together support reasonable inference of premeditation; conviction affirmed

Miranda v. Arizona, 384 U.S. 436 (1966) (Miranda warnings required prior to custodial interrogation)
State v. Biron, 123 N.W.2d 392 (Minn. 1963) (coercive promises can render confession involuntary)
State v. Thaggard, 527 N.W.2d 804 (Minn. 1995) (statement voluntary despite suggestion of treatment when totality shows understanding)
Lynumn v. Illinois, 372 U.S. 528 (1963) (confession involuntary where will overborne by coercive police actions)
State v. Slowinski, 450 N.W.2d 107 (Minn. 1990) (police assurances about psychiatric help may be improper; evaluate coercion under totality)
State v. Palmer, 803 N.W.2d 727 (Minn. 2011) (post‑shooting conduct and finishing wounds can support premeditation)
State v. Leake, 699 N.W.2d 312 (Minn. 2005) (premeditation requires some appreciable time for deliberation; circumstantial proof)
State v. Moore, 481 N.W.2d 355 (Minn. 1992) (clarifying need for appreciable time between intent formation and killing)
State v. Buchanan, 431 N.W.2d 542 (Minn. 1988) (a pause between shots may support premeditation)
State v. Kirch, 322 N.W.2d 770 (Minn. 1982) (arming oneself prior to robbery may support inference of preparedness to kill)