State of Minnesota v. Sheldon James Thompson, 3 N.W.3d 257

Sheldon James Thompson was convicted of three counts of first-degree premeditated murder (his girlfriend Jackie Defoe, her 20-month-old son Kevin, and Defoe's unborn child) in Carlton County, Minnesota.
The prosecution presented evidence including Thompson’s confession to his cousin, physical evidence tying him to the scene, and witness testimony regarding his past domestic abuse and relationship with Defoe.
The prosecutor, in closing arguments, made several speculative statements regarding Thompson’s motives and actions related to the murders.
Thompson did not object to these statements during trial; afterwards, he appealed, arguing prosecutorial misconduct (improper speculative remarks) requiring a new trial.
The Minnesota Supreme Court was tasked with deciding whether the closing argument constituted plain error affecting Thompson’s substantial rights, or whether a new trial was otherwise appropriate under the court's supervisory powers.

Issue	Thompson's Argument	State's Argument	Held
1. Did the prosecutor’s closing argument constitute plain error affecting substantial rights?	Prosecutor’s speculative statements were improper and prejudiced the jury, warranting a new trial.	Evidence of guilt was overwhelming; statements did not affect the outcome or substantial rights.	No plain error affecting substantial rights; no new trial.
2. Should the court grant a new trial under supervisory powers due to repeated prosecutorial misconduct?	Speculative statements are a recurring problem, justifying a prophylactic reversal to deter future misconduct.	This is not a rampant issue; rare allegations over decades and not exceptional here.	No exceptional circumstances; supervisory power not invoked.

State v. Smith, 932 N.W.2d 257 (Minn. 2019) (forfeiture doctrine and need to object to preserve issues for appeal)
State v. Ramey, 721 N.W.2d 294 (Minn. 2006) (modified plain error standard for unobjected-to prosecutorial misconduct)
State v. Peltier, 874 N.W.2d 792 (Minn. 2016) (analysis of prejudice for prosecutorial misconduct)
Anderson v. State, 982 N.W.2d 448 (Minn. 2022) (exceptional circumstances required to exercise supervisory powers)
State v. Salitros, 499 N.W.2d 815 (Minn. 1993) (exercise of supervisory power upon repeated, condemned prosecutorial tactics)
State v. Ferguson, 581 N.W.2d 824 (Minn. 1998) (jury presumed to follow court instructions)