Breanna Canter’s young son was inside the family’s apartment when the 30-year-old mother was fatally shot in September 2024.
DENVER, Colo. — Breanna Canter’s young son was inside her Denver home when she was fatally shot in 2024. Two years later, a judge sentenced the child’s father, Tyler Nelson, to 40 years in prison for murdering her.
Canter was 30 when she died in the main bedroom of the family’s apartment in the 600 block of South Dayton Street. Denver District Attorney John Walsh described her after sentencing as a loving mother and beloved daughter and said her death had been especially devastating for her son and her parents. The child was not injured in the shooting. Authorities have released little additional information about him, and public accounts do not establish that he saw the shooting. The facts that are known, however, placed the consequences for Canter’s family at the center of the prosecution’s final public statement after Nelson was convicted of second-degree murder and first-degree assault.
District Judge Stephanie Scoville sentenced Nelson on Sept. 30, about six weeks after a Denver jury returned the two guilty verdicts. The court’s action was the culmination of a case that began with Nelson calling 911 shortly after 1 a.m. on Sept. 24, 2024. He told authorities that his wife had been shot. When officers arrived, they found Canter on the bedroom floor with a shotgun wound. A shotgun was near an open closet, positioned with its muzzle facing upward. Nelson told investigators the shooting had been accidental, setting up the factual dispute that would follow the case from its first hours through the eventual murder prosecution.
Canter’s death was initially investigated through the physical scene and the account Nelson gave police. According to reports based on the probable cause affidavit, Nelson said the couple had argued before the shooting. He told detectives that Canter had complained about him playing games on his cellphone instead of paying attention to her. Nelson said he then went into a bathroom. When he returned, according to his account, Canter was holding a shotgun and asking him about its safety. He said both had been drinking and that he tried to take the gun because he believed the situation was unsafe.
Nelson told police that Canter would not release the weapon and that they struggled over it. His initial description placed the shotgun inside a soft carrying case. He said his knuckle contacted the trigger through the case and the weapon fired. Investigators questioned that explanation after looking at the bedroom and Canter’s wounds. The shotgun was outside the case when police found it. Reports citing investigative records also said wounds involving Canter’s upper chest and chin area did not appear to match the way Nelson said the gun had discharged. When detectives confronted him about the shotgun being outside its case, Nelson said he could no longer say with certainty whether it had been in the case or when it had been removed.
That shift in Nelson’s account became one part of a broader investigation into whether Canter’s death could reasonably be treated as an accidental shooting. Police also recorded their observations of Nelson after he left the apartment. An affidavit said he did not ask about his wife’s condition or about his son for much of the time he was at police headquarters and appeared to show little emotion. Separate reporting on the document said Nelson became upset when investigators told him Canter had died. Those observations were included in the case records, but investigators had evidence beyond demeanor: they said Nelson’s description of the shotgun, the weapon’s actual location and the appearance of Canter’s injuries did not fit together.
Police arrested Nelson on suspicion of first-degree murder and first-degree assault in the immediate aftermath of the shooting. The first-degree murder allegation reflected the seriousness of the initial case, but it was not ultimately the murder offense on which the jury convicted him. After the prosecution proceeded to trial in 2026, jurors returned a second-degree murder verdict in August and also found Nelson guilty of first-degree assault. Colorado law generally defines second-degree murder as knowingly causing another person’s death and treats the ordinary offense as a class 2 felony. The verdict meant the jury found Nelson guilty of murder while stopping short of the first-degree murder allegation associated with his arrest.
For Canter’s family, the legal distinctions determined the conviction and punishment but did not change the central loss. Walsh’s statement after sentencing described her through her relationships rather than through the evidence photographs, police affidavit or criminal counts that had dominated the court case. He called her a loving mother and beloved daughter. He said the killing was a terrible tragedy, most profoundly for her son and parents, and said the 40-year sentence provided a measure of justice for Canter, her family and her friends. The comments were among the limited publicly reported descriptions of Canter beyond the circumstances of her death.
The presence of a child in the apartment also gave the crime a consequence that cannot be measured only through Nelson’s prison term. Public reports say the boy was unharmed, but they provide no basis for describing what he heard, saw or understood. Responsible reporting therefore stops short of assigning him memories or trauma that have not been documented publicly. What prosecutors have said is that the loss of his mother was profound. The case left the child at the center of a family rupture created by a killing for which his father has now been convicted.
Nelson’s 40-year sentence is substantial within Colorado’s punishment structure for violent felonies. State legislative materials classify second-degree murder as a class 2 felony, while Colorado’s sentencing guide lists a 16- to 48-year imprisonment range for class 2 crimes of violence. The available reports do not include a complete transcript of Scoville’s sentencing comments, so it is not possible to reliably describe every aggravating or mitigating factor argued before the court or the specific reasoning she gave for selecting 40 years. The confirmed result is that Nelson was ordered to spend decades in state custody after the jury’s murder verdict.
The sentencing also brought the case to a different stage than the one that existed on the morning Canter died. In 2024, officers were responding to a 911 call and trying to determine whether a fatal shooting described as accidental had actually happened that way. Investigators documented inconsistencies, arrested Nelson and developed a homicide case. In August 2026, jurors resolved the question of criminal guilt. In September, Scoville imposed punishment. The transition from investigation to conviction is especially important when recounting the earlier records: statements in the arrest affidavit were allegations and investigative observations at the time, while Nelson’s murder conviction is now an adjudicated fact.
The 2024 records also show why investigators did not accept the accident explanation simply because Nelson was the person who called for help. A 911 call established that he reported the shooting; it did not establish how the shotgun fired. Detectives tested his description against the apartment. He said the gun had been inside a carrying case, while they found it outside. He described accidental trigger contact during a struggle, while they said Canter’s wounds and their initial scene examination did not appear to match that mechanism. Nelson then expressed uncertainty about the case detail after being challenged. Those inconsistencies formed the factual backdrop of the prosecution that eventually reached a jury.
The court record also reflects a narrower outcome than the initial arrest allegation. Nelson was not convicted of first-degree murder. He was convicted of second-degree murder. That distinction should not be blurred when describing the case because the jury’s actual verdict, rather than the charge initially suspected by police, is what now defines his criminal responsibility. At the same time, describing the shooting as merely an alleged murder would now understate the legal status of the case: a jury has found Nelson guilty, and a judge has sentenced him.
Canter’s death occurred at age 30, inside the home where her child was present. The public record offers no way to restore the years she lost or the family relationships prosecutors emphasized after sentencing. The criminal justice system instead produced the forms of resolution available to it: a jury verdict and a prison sentence. Walsh said he hoped the punishment would offer some measure of justice, language that acknowledged the limits of what a sentence can accomplish after a death.
For Canter’s family, the court’s work has produced a verdict and a sentence but cannot undo the loss prosecutors emphasized after the hearing. Her son was unharmed in the apartment that night, yet he was left without his mother. Nelson is now serving the 40-year sentence imposed for her killing, leaving Canter’s death — and the family relationships cut short by it — as the lasting consequence beyond the courtroom.
Author note: Last updated November 10, 2026.