John Claburn waited hundreds of days to tell investigators what he said Joseph Nevera showed him the night Osborne disappeared.
MORGANTOWN, W.Va. — The witness who supplied some of the most important testimony against Joseph Nevera also gave defense lawyers one of their strongest arguments: John Claburn said he saw Kimberly Osborne’s body in Nevera’s truck the night she vanished, but he kept that knowledge from investigators for more than a year and a half.
Jurors ultimately believed the prosecution’s case. They convicted Nevera in April of first-degree murder in Osborne’s 2024 death, then denied him mercy, eliminating any chance of parole. Monongalia County Circuit Judge Cindy Scott formally sentenced Nevera to life in prison without parole on Aug. 10. The verdict rested on a larger body of evidence that included earlier domestic violence, threats witnesses attributed to Nevera and Osborne’s disappearance while she was trying to end the relationship. Yet Claburn’s account provided the most direct testimony about what Nevera allegedly said and did immediately after the killing.
Claburn told jurors that he and Nevera had been close friends. On the evening of May 12, 2024, Nevera arrived at Claburn’s camper near Morgantown and made a statement Claburn at first struggled to take seriously: He said he had killed Osborne. Claburn testified that he initially thought Nevera was joking or intoxicated and told him to stop. Nevera then took him to a Chevrolet Silverado and opened the vehicle so Claburn could see Osborne’s body. At that point, Claburn said, there was no longer any question in his mind that something terrible had happened.
What Claburn did next became almost as important at trial as what he claimed to have seen. He did not call police. According to courtroom reporting, he followed as Nevera drove away and was present during part of the period in which Nevera went to the area where prosecutors said Osborne was buried. Claburn denied helping bury her. Investigators later examined dirt on his work boots and found that it did not match the soil at the grave site, according to testimony reported by The Dominion Post. Still, his failure to tell authorities led to an accessory-after-the-fact charge and later a guilty plea.
The silence lasted while Osborne’s family was searching for her. She had disappeared on Mother’s Day, when relatives expected the mother of three at a family gathering. For months, there was no public confirmation of what had happened. In November 2024, a man practicing archery in woods near Little Indian Creek Road encountered remains in a shallow grave. The site was roughly two miles from a residence Osborne and Nevera had shared. Authorities identified the remains as Osborne’s, changing the missing-person investigation into a confirmed homicide inquiry. Nevera was arrested the following month.
Even then, Claburn’s full story had not reached investigators. He finally spoke with authorities in January 2026, roughly 600 days after Osborne vanished. By the time of Nevera’s April trial, the delay was impossible for either side to ignore. Defense attorney Christopher Wilson repeatedly questioned why jurors should rely on a witness who claimed to have known of a murder yet withheld that information while Osborne’s family searched and investigators worked the case. Wilson also noted that Claburn faced criminal charges and challenged whether self-interest had shaped his decision to come forward.
Prosecutors responded by emphasizing what Claburn had not received. Detective Joshua Ward testified that Claburn did not ask for immunity, and the state said it still intended to prosecute him as an accessory. Claburn himself rejected the suggestion that he had secured a favorable deal, telling the defense that he faced the possibility of losing years of his life to prison. The prosecution argued that his delayed cooperation did not make the underlying account false and that other evidence independently supported the picture he gave jurors of Nevera’s relationship with Osborne and the events around her disappearance.
That other evidence reached back to January 2022. Jurors viewed police body-camera footage of Osborne describing an incident in which she said Nevera had choked her until she lost consciousness. She told a deputy that Nevera had climbed on top of her during an argument and squeezed her neck. The recording gave prosecutors evidence of prior violence that predated her death by more than two years. Friends and other witnesses also described threats Nevera allegedly made as the relationship deteriorated. One account had him warning that Osborne could end up “in a grave or a hole in the ground.”
Prosecutors said Osborne was preparing to leave Nevera and that the couple argued on the day she vanished. Ward testified about a witness who heard Nevera threaten to choke Osborne and say she would not be found. The state argued that those statements took on added significance once Osborne was recovered from a shallow grave. Combined with Claburn’s testimony that Nevera showed him her body, prosecutors presented the threats as part of a connected sequence rather than isolated angry remarks. They argued that Nevera had both a history of violence toward Osborne and an immediate conflict with her as she sought to end the relationship.
The defense contested whether that sequence proved murder beyond a reasonable doubt. Wilson stressed the absence of physical evidence conclusively tying Nevera to the act that caused Osborne’s death. Because her remains were not discovered for months, forensic experts faced limitations in determining the exact medical circumstances of her death. The defense argued that the government was relying too heavily on Claburn, whose extraordinary delay gave jurors reason for caution. In closing, Wilson focused on the gap between suspicion and the legal burden required for a first-degree murder conviction.
Prosecutor Gabrielle Mucciola urged jurors to consider all of the evidence together. The state’s case was not simply that Claburn said Nevera confessed, but that his account fit the domestic-violence history, threats, relationship breakup and circumstances of Osborne’s disappearance and burial. After several hours of deliberations on April 21, the jury returned a guilty verdict. The panel then heard a separate round of testimony to determine whether the life sentence required for first-degree murder should include mercy and therefore the possibility of parole.
Osborne’s relatives became the focus of that next phase. Her mother, Rose Osborne, described holding onto hope during the months her daughter was missing and knowing what had happened when police finally arrived at her home after the body was found. Osborne’s teenage daughter described the lasting effects of her mother’s death and the future milestones they would no longer share. Nevera’s defense asked jurors to grant mercy. The prosecution opposed it. The jury decided Nevera should spend life in prison without the possibility of parole, a decision Scott later imposed as the formal sentence.
Claburn’s role in the trial produced another criminal case before the murder jury had even finished its work. Shortly after he testified, his camper caught fire. Authorities said Claburn had previously received threats accusing him of being a “rat,” prompting deputies to place surveillance equipment near the property. Investigators arrested David Dewalt, an Ohio man they said appeared on video at the camper shortly before the blaze. He was charged with first-degree arson and retaliation against a witness and denied setting the fire, according to authorities. Those charges were separate from Nevera’s prosecution.
The unusual sequence left Claburn in a complicated position: a friend of both people at the center of the case, a witness against Nevera and a defendant because of his own failure to report what he knew. His testimony did not stand alone, but it gave the jury an account of the hours after Osborne disappeared that investigators could not obtain from physical evidence alone. For the defense, his long silence remained a reason to doubt him. For prosecutors, the fact that he faced punishment rather than immunity supported their argument that he had little to gain by finally telling authorities what he knew.
As Nevera’s Aug. 10 sentencing brings the central murder case to a close. He will serve life without parole for Osborne’s death. The final judgment followed a prosecution in which a delayed witness account became one piece of a wider evidentiary chain — one that began with earlier allegations of violence, continued through Osborne’s unexplained Mother’s Day disappearance and ended with a jury finding that Nevera, not the witness who waited too long to speak, was responsible for killing her.
Author note: Last updated September 22, 2026.