John Carter, guilty in death of Katelyn Markham, denied early prison release

John Carter, who pleaded guilty in the death of his Fairfield girlfriend Katelyn Markham, has been denied early release from prison.

Carter was in Butler County Common Pleas Court on Friday for a hearing linked to the highly publicized criminal case.

Judge Daniel Haughey denied his request for early release from prison.

“He should serve every second of the sentence imposed,” Butler County Prosecutor Michael Gmoser said during the hearing. “He should go forth henceforth and answer to the public, who will demand the truth from him. Such is the way in the court of public opinion and the way of all affected by his conduct and deceit.

“He has, after all, taken the coward’s way out and should be given nothing more by this court than the maximum sentence the court wisely and correctly imposed.”

Carter was engaged to Markham at the time of her 2011 disappearance and death. She was days away from her 22nd birthday.

After years of investigation by Fairfield Police Department, no arrests were made even after Markham’s body was found in Indiana. In March 2023, an indictment against Carter was returned by a Butler County grand jury after the county prosecutor’s investigators had taken another look and probed the evidence for about 18 months.

In early June 2024, Carter agreed to a plea deal that reduced a murder charge down to involuntary manslaughter. A month later, he was sentenced to three years in prison, the maximum sentence for the third-degree felony.

Last October, Carter, 37, filed a motion in Butler County Common Pleas Court asking a judge to release him early after only serving a little more than a year in prison.

On Jan. 9, 2026, Judge Daniel E. Haughey, denied early release for John Carter, who pleaded guilty in the death of his Fairfield girlfriend Katelyn Markham. NICK GRAHAM, STAFF

Credit: Nick Graham

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Credit: Nick Graham

In his appeal, Carter’s attorney, Cornelius Lewis, addressed that his client “has worked extremely hard at being a ‘model-inmate’ by engaging in positive programs and avoiding the negative prison environment.”

Markham’s death has been classified as a homicide, though the exact cause remains undetermined.

Gmoser said that what has been missing in the case are the answers to why and how Caden Martin was killed and who, if anyone, assisted Carter in any way.

“The defendant who was given an unprecedented opportunity to answer all of these questions without recourse, and you requested this matter be continued, in progress for that purpose until today,” Gmoser said. “During that time, the defendant’s attorney informed my team that the defendant did not wish, after all, to take advantage of what was offered.”

Dave Markham, the father of Katelyn Markham attends an early release hearing Jan. 9, 2026 for John Carter, who pleaded guilty to her death. Carter was denied early release from prison. NICK GRAHAM, STAFF

Credit: Nick Graham

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Credit: Nick Graham

Gmoser said that, as he earlier posited, “I assume the truth must be unimaginably worse than anyone may think.”

”After all, the anthropologist expert in this case opined that after her body was first deposited in the dump in Indiana, her head was removed and later returned in the plastic grocery bag. Little wonder the defendant did not want to explain that along with the rest.”

Judge Haughey, before issuing his ruling, said he agreed with Lewis that Carter has been “a model inmate” and that during this time, while the case was pending, Carter did not violate the terms of his bond.

“I agree that there’s nothing to suggest that outside of this horrific incident that the court ultimately adjudicated that Mr. Carter has done anything other than be a law-abiding citizen, but we don’t get to hit a reset button,” Judge Haughey said. “We don’t get to undo what’s been done.”

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