Authorities said a resident’s recording and surveillance footage helped quickly identify Ernest Cunningham after the killing of Kelsey Roberts-Gariety.
DENVER, Colo. — The murder case against Ernest Cunningham was built around a short timeline and a visible escape route, ending with a 42-year prison sentence for the 2024 killing of 23-year-old Kelsey Roberts-Gariety at her apartment in southeast Denver.
What made the case notable was not a complicated forensic mystery but the speed with which investigators were able to connect the shooting scene to the man later convicted. Public reporting said residents heard the gunshot, one witness recorded a man leaving the building in a car, and surveillance cameras captured the same vehicle pulling away moments after the shooting. Prosecutors later matched that evidence to a motive they said began with a former workplace dispute and ended when Cunningham showed up at the apartment looking for Roberts-Gariety’s husband.
The first public signs of the case were local alerts about a shooting near the 800 block of South Dexter Street. When officers responded on June 29, 2024, Roberts-Gariety was dead. The next details that emerged showed how quickly the scene began to produce direction for detectives. One resident heard not just the shot but also someone running away. Another resident recorded Cunningham leaving in his car, according to later reporting. Surveillance video, police said, also showed the vehicle leaving the area moments after the gunfire. In many homicide cases, investigators spend days or weeks simply trying to identify who was present. Here, the public record suggests that within hours they had enough to trace the suspect and arrest him. The speed of that process likely mattered later because it helped prosecutors present the killing as a direct and uninterrupted series of actions rather than an uncertain event clouded by competing accounts.
That evidence trail mattered because motive alone was not the whole story. Prosecutors said Cunningham had worked with Roberts-Gariety’s husband until he was fired. After that, according to reporting on the arrest affidavit, the husband told police Cunningham knew where the couple lived, had “issues” with him and had made repeated threatening calls. The district attorney later said Cunningham went to the apartment intending to confront the husband. But the person who came to the door was Roberts-Gariety, and she was shot instead. The public file does not fully explain every step in Cunningham’s decision-making before he arrived, and one part of the workplace history remains unclear: a report said the husband told police Cunningham used drugs on the job, but it also said the public record did not clearly establish whether that led to his firing. Even so, the state did not need every workplace detail resolved to draw a line from grievance to arrival, gunfire and flight.
The court case then shifted from investigation to proof beyond a reasonable doubt. Cunningham was tried in Denver, and a jury convicted him on Dec. 22, 2025, of second-degree murder. That conviction signaled jurors were persuaded not only that he was the shooter, but also that the mental state required for the charge had been proved. On Feb. 27, 2026, a judge sentenced him to 42 years in prison. When the district attorney announced the sentence days later, the office singled out Senior Deputy District Attorney Matt James, Associate Deputy District Attorney Makayla Samour and Detective Gavin Whitman. The public statement did not describe a pending retrial, mistrial issue or unresolved major evidentiary dispute, suggesting the case had moved cleanly from investigation to verdict to punishment.
The human facts, however, never disappeared behind the mechanics of the investigation. Roberts-Gariety was 23. Her obituary said she lived in Denver with her husband and their pets. Relatives described her as kind and loved, and family members from Ohio spoke publicly after the killing about their disbelief. At sentencing, one of the sharpest public statements came from her sister, who said that while the family would carry lifelong grief, the 42-year sentence made her feel justice had been served. Those remarks gave the final hearing a purpose different from the trial. Trial asks whether the state has proved the charge. Sentencing asks what the law can do after proof is complete. In this case, the answer was a long prison term set against a death the family says cannot be measured by years alone.
The case also stood out because the person killed was not the person prosecutors said Cunningham had gone there to confront. That detail altered how the public understood the danger described by the evidence. The shooting was not presented as random, but neither was Roberts-Gariety described as the source of the conflict. She became the victim because she was the one at the front door when Cunningham arrived. Combined with the fact that he was on parole for a prior burglary conviction, the case carried a broader public weight even without expanding into additional public proceedings about parole oversight or workplace responsibility. The public record released so far has remained centered on the murder itself.
The evidence story is now over in the trial court, and the sentence has been set. What remains is the narrower legal question of whether Cunningham pursues an appeal. Unless that happens, the resident video, the surveillance footage and the witness accounts will stand as the backbone of the case that brought the killing of Kelsey Roberts-Gariety to a verdict and sentence.
Author note: Last updated March 31, 2026.