A jury rejected Tyler Nelson’s account that Breanna Canter was fatally shot during an accidental struggle over a shotgun.

DENVER, Colo. — A Denver man has been sentenced to 40 years in prison for the 2024 shotgun killing of his wife, ending the trial-level phase of a case in which investigators said his account of an accidental shooting conflicted with evidence inside the couple’s apartment.

District Judge Stephanie Scoville imposed the sentence Sept. 30 on Tyler Nelson, who was convicted by a jury in August of second-degree murder and first-degree assault in the death of 30-year-old Breanna Canter. The shooting occurred shortly after 1 a.m. on Sept. 24, 2024, in the couple’s apartment in the 600 block of South Dayton Street. Their young son was inside the home and was not injured. Nelson had maintained after the shooting that the shotgun discharged accidentally while he and Canter struggled over it, but investigators documented several parts of his account that they said did not fit what they found at the scene.

The 40-year term followed a case that began with Nelson himself calling 911. Denver police said he reported a shooting at his residence just after 1 a.m. Responding officers entered the apartment and found Canter on the floor of the main bedroom with a shotgun wound. Officers also saw a shotgun leaning near an open closet with its muzzle pointed upward, according to reporting based on the probable cause affidavit. The Denver Office of the Medical Examiner later identified Canter and determined that she died from a shotgun wound. Nelson, who was 30 at the time, was arrested as investigators examined whether his description of the shooting was consistent with the physical evidence.

Nelson told investigators that he and Canter had been arguing before the gun went off. According to reports citing police records, he said Canter had accused him of spending time playing games on his cellphone instead of paying attention to her. Nelson said he went into a bathroom and, after returning, saw Canter holding the shotgun and asking him about its safety. He told detectives that both of them had been drinking and that he tried to take the weapon from her because he believed the situation was unsafe. Nelson said Canter resisted giving it to him, leading to a struggle over the gun.

One of the most important parts of Nelson’s initial account involved the shotgun’s soft carrying case. He told investigators that the weapon had remained inside the case and that, during the struggle, his knuckle caught the trigger through the material, causing the gun to fire. Investigators said that explanation raised problems almost immediately. The shotgun was found outside the case, and police said Canter’s injuries and their preliminary examination of the bedroom did not appear to match Nelson’s description of how the weapon discharged. When detectives later questioned him about why the gun was outside its case, Nelson said he was no longer certain whether it had been inside the case or when it might have been removed.

Those inconsistencies became central to the investigation because Nelson was presenting the shooting as an accident rather than an intentional act. Police did not simply rely on his description of what happened. They compared it with the location of the weapon, Canter’s injuries and the condition of the room. The probable cause material described wounds involving Canter’s upper chest and chin area that investigators said did not line up with Nelson’s explanation. Authorities eventually arrested him on suspicion of first-degree murder and first-degree assault. The case later went before a jury, which did not convict him of first-degree murder but instead found him guilty of second-degree murder and first-degree assault.

The distinction matters under Colorado law. Second-degree murder generally applies when a person knowingly causes another person’s death and is ordinarily classified as a class 2 felony. Colorado’s sentencing framework provides substantially greater prison exposure for a class 2 felony treated as a crime of violence. The jury’s verdict therefore established criminal responsibility for Canter’s death while stopping short of the first-degree murder charge on which Nelson had originally been arrested. The sentencing record reported publicly does not establish that the jury accepted every theory or piece of evidence advanced during the case, but its verdict rejected Nelson’s position that the fatal shooting amounted only to an accident for which he bore no murder liability.

Police records also described Nelson’s behavior after the shooting. According to the arrest affidavit as reported by local and national news organizations, investigators wrote that Nelson did not ask officers about Canter’s condition while he was at police headquarters and did not ask about the couple’s son. Officers said he showed little emotion during much of that period, although another account of the affidavit said he became upset after he was told Canter had died. A person’s demeanor alone does not establish how a shooting occurred, and the public accounts of the case indicate that investigators also relied on the physical scene and Nelson’s changing description of the shotgun when building the case.

By the time Nelson returned to court for sentencing, the central question of criminal guilt had been resolved by the jury. Scoville sentenced him to 40 years in a state correctional facility. The punishment is lengthy but remains within the sentencing structure Colorado uses for serious violent felonies. State legislative materials classify ordinary second-degree murder as a class 2 felony, and Colorado’s crime-classification guide lists a 16- to 48-year prison range for a class 2 crime of violence. Public reports of Nelson’s sentencing identify the 40-year prison term but do not provide a complete transcript of Scoville’s remarks or detail every sentencing factor she considered.

Denver District Attorney John Walsh focused his public comments on Canter and the effect of her death on the people closest to her. Walsh described Canter as a loving mother and beloved daughter and said her murder was a terrible tragedy, particularly for her young son and her parents. He said the sentence required Nelson to pay a heavy price for his actions and expressed hope that it would provide some measure of justice to Canter’s family and friends. The statement placed the sentencing in a broader context than the dispute over Nelson’s account of the shooting: Canter was killed inside her home while the couple’s child was also there.

The sentence came almost exactly two years after the shooting. The case moved from the early-morning 911 call in September 2024 to Nelson’s arrest, prosecution and eventual jury trial in 2026. In August, the Denver District Attorney’s Office publicly announced that jurors had convicted him of second-degree murder and first-degree assault and said he would be sentenced Sept. 30. Scoville then imposed the 40-year term on that date. That sequence transformed the case from an investigation built around competing explanations of a fatal shooting into a final judgment of conviction at the trial-court level.

Several details that drew attention at the beginning of the investigation remained important because they showed why detectives questioned the accident account. Nelson said the dispute involved gun safety, yet investigators said the physical condition of the weapon and the scene did not support his first description. He initially placed the shotgun inside its case when it fired, but officers found it outside the case. He described a struggle in which his knuckle inadvertently contacted the trigger, but police said the pattern of Canter’s injuries did not appear consistent with that explanation. Those discrepancies were documented well before the jury ultimately determined that Nelson was guilty of murder.

Canter was 30 when she died. Authorities have released only limited information publicly about the couple’s child, appropriately keeping the focus away from a young person who was not accused of wrongdoing. What is established is that the child was in the apartment at the time and was unharmed. Walsh’s statement after sentencing emphasized that Canter’s death left consequences that extended beyond the criminal proceeding, describing the loss as particularly profound for her son and parents.

The sentence closes the trial-court phase with Nelson convicted of second-degree murder and first-degree assault and ordered to serve 40 years in prison. No later ruling changing that judgment was identified in the public records and reporting reviewed through Nov. 10. What began as Nelson’s report of an accidental shooting now stands, after a jury verdict and sentencing, as a murder case carrying a decades-long prison term.

Author note: Last updated November 10, 2026.