Shaun Kenneth Hamilton v. State, 396 P.3d 1009

Defendant Shaun Kenneth Hamilton was convicted by a jury on five counts of sexual assault/sexual abuse of minors (one incident involving KB, three involving JP); convictions followed a four-day trial and resulted in lengthy concurrent and consecutive prison terms.
KB (age 14 in 2015) reported an assault; forensic exam and DNA testing matched semen on KB’s abdomen and mattress topper to Hamilton; penile swabs from Hamilton matched both KB and Hamilton.
CPD reopened an earlier allegation by JP (age 5–6 at the time) resulting in additional charges; the State tried KB’s and JP’s allegations together.
At closing, the prosecutor (1) attempted to define "reasonable doubt," (2) criticized and ridiculed the defense’s explanations, and (3) made statements suggesting the defendant needed to explain evidence—raising claims of burden-shifting.
Hamilton did not object at trial; the Supreme Court reviewed for plain error and evaluated (1) whether the record clearly showed each alleged misstatement, (2) whether each violated an unequivocal legal rule, and (3) whether the errors cumulatively deprived him of a fair trial.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Prosecutor defined "reasonable doubt" in closing	State argued the prosecutor properly explained burden (not absolute certainty)	Hamilton argued the prosecutor improperly defined reasonable doubt	Court: Prosecutor did define reasonable doubt; that was prosecutorial misconduct (plain error prong 2 satisfied)
Denigration of defense in closing	State characterized remarks as fair commentary on defense theory	Hamilton argued remarks ridiculed defense and counsel, inflaming jury	Court: Remarks were strong but addressed defense theory, not personal attacks; no clear legal transgression; not plain error
Burden-shifting—suggesting defendant must explain evidence	State: comments addressed lack of defendant evidence and inferences from record	Hamilton: prosecutor shifted burden by saying defendant "must" or "until they come up with" an explanation	Court: Statements impermissibly suggested a burden on defendant—constituted prosecutorial misconduct (plain error prong 2 satisfied)
Cumulative error from multiple prosecutorial transgressions	State: any errors were isolated to closing and harmless given overwhelming evidence and repeated jury instructions on State's burden	Hamilton: combined errors denied fair trial	Court: Although two errors occurred (defining reasonable doubt; burden-shift), cumulative effect was not prejudicial given context and strong, uncontroverted DNA and testimonial evidence; convictions affirmed

Watts v. State, 370 P.3d 104 (Wyo. 2016) (prosecutor may not define "reasonable doubt"; framework for cumulative-error plain-error review)
Schafer v. State, 197 P.3d 1247 (Wyo. 2008) (prosecutor’s suggestion that defendant must offer explanation is impermissible; curative instruction can cure error)
Seymore v. State, 152 P.3d 401 (Wyo. 2007) (prosecutor may not argue defendant should produce exculpatory evidence; such comments can shift burden)
Collins v. State, 354 P.3d 55 (Wyo. 2015) (reiterates that prosecutors should not suggest defendant bears any burden of proof)
Phillips v. State, 835 P.2d 1062 (Wyo. 1992) (longstanding rule that burden rests on the State and prosecutor must not shift it)