The prison term for Luka Rasmussen followed a fatal shot fired during a night of hanging out, marijuana use and careless handling of a loaded pistol.
CASPER, Wyo. — A Wyoming judge sentenced Luka Wade Rasmussen to 10 to 16 years in prison for the shooting death of Riley Sears, bringing legal finality to a case built around one question: how a routine night among teenagers ended with a 16-year-old dead.
The answer offered by prosecutors was blunt. Riley Sears died because a loaded gun was handled recklessly in a house where teenagers were smoking marijuana and playing Madden. Rasmussen, now 19, pleaded guilty in October to involuntary manslaughter, accepting criminal responsibility for the Feb. 12, 2025 shooting at a home in the 4000 block of East 8th Street in Casper. The sentencing hearing then became a fight over consequence. The state argued that Riley’s death grew out of repeated bad choices and called for a long prison term. The defense asked the judge to focus on Rasmussen’s youth, his remorse and the fact that the charge was not murder.
By the time the case reached sentencing, many of the main facts were no longer disputed. Riley, Rasmussen and another teenage boy were together at the East 8th Street home the night of the shooting. They were playing video games and smoking marijuana when Rasmussen began handling a pistol. Prosecutors said he pointed the gun’s laser at Riley with a round chambered. A shot was fired, and Riley was hit in the head. The sequence mattered because the state used it to argue that the death was not an unforeseeable accident. Instead, prosecutors said, it was the natural outcome of playing with a loaded firearm after basic safeguards had already been ignored. Police later recovered guns at the property, and testimony described how the investigation focused on where the weapons were found, what condition they were in and what the surviving teenagers said happened in the room.
Riley’s death stayed central to the hearing not just as a legal result but as a personal rupture. His father, Jacob Sears, described receiving the kind of call that permanently divides life into before and after. Public coverage of the sentencing also reflected how strongly the family rejected any attempt to frame the shooting as simple bad luck. Riley was a teenager spending time with people he knew, in a home setting that would not normally seem dangerous. That fact gave the case a particular force in Casper, where residents could recognize the ordinary details of the night even as they recoiled from the ending. A living room, a game on a screen and teenagers hanging out are ordinary images. In this case, those ordinary details became the background to a fatal decision involving a loaded weapon.
Natrona County District Attorney Dan Itzen used the hearing to stress what he portrayed as the common-sense core of the case. He said marijuana use, laser-pointing and a chambered round should have made the danger obvious before anyone was hurt. He also said Rasmussen had been warned before about pointing his gun at people, an allegation that pushed the state’s argument beyond a single impulsive act and toward a pattern of risky behavior. Defense attorney Marty Scott asked the court to see Rasmussen as more than the worst thing he had done. Rasmussen apologized, saying he had taken away a son and a grandson and had also lost a friend. Judge Kerri Johnson had to weigh those competing views: one centered on youth and remorse, the other on recklessness and irreversible loss.
The sentence of 10 to 16 years landed between those poles. It was not the maximum available penalty for every conceivable outcome in a homicide case, but it was severe enough to ensure Rasmussen would spend his early adult years in prison. That matters in procedural terms because the case ended with a plea, not a jury verdict. There was no trial deciding intent in the murder sense. Instead, the court accepted the guilty plea to involuntary manslaughter and then decided what punishment fit conduct that caused death without being charged as intentional homicide. In that structure, the sentencing hearing carried unusual weight. It became the moment when the public heard the moral arguments around the case laid out most sharply, and the prison term made clear the judge saw the conduct as more than a youthful lapse.
The broader context is difficult to ignore. Teen gun deaths often draw headlines for a few days and then fade into statistics, but this case remained vivid because the details were so specific and so recognizable. The game was Madden. The gathering was among friends. The gun was not pulled during a robbery or a street fight. It was handled in a social setting where the danger appears, in hindsight, painfully obvious. That did not make the case legally complex in the usual way. What it did was strip away excuses. The shooting became a test of whether a court would treat reckless gun handling among teenagers as a tragedy alone or as a prison offense carrying years of punishment. The answer, after the plea and sentencing, was unmistakable.
Where the case goes next is limited by what has already happened. Rasmussen has admitted guilt and received a prison term. Any later developments would likely involve the ordinary appellate or post-sentencing process rather than disputed fact-finding about the shooting itself. For Riley Sears’ family, the legal chapter has produced a sentence. The private chapter that follows will last much longer.
Author note: Last updated March 25, 2026.