John Carter appeared determined to search out his lacking fiancée.
On the evening of Aug. 14, 2011 — lower than 24 hours after Katelyn Markham had final been seen within the Cincinnati suburb the place she lived — Carter dialed 911 and reported her lacking. In the months and years that adopted, he repeatedly supplied info to police. He spoke out to native and nationwide media, pleading for her return, and, in a single interview, he advised NBC’s “TODAY” present he was nonetheless calling her cellphone day by day.
“That’s all I’ve been doing is hoping,” he mentioned then.
But, final 12 months — greater than a decade after Markham’s stays have been found in a makeshift dump in Indiana — Carter’s portrayal of himself as a determined associate unraveled with a surprising growth: He was indicted on two counts of homicide in Markham’s loss of life.
Weeks earlier than his trial was set to start this June, there was extra startling information: Prosecutors had agreed to drop the cost if Carter pleaded responsible to the lesser crime of involuntary manslaughter.
On July 18, a choose sentenced Carter, 36, to the utmost jail time period allowed underneath Ohio regulation — three years.
In an interview with “Dateline,” Butler County Prosecuting Attorney Michael Gmoser detailed why he selected to pursue costs in opposition to Carter after greater than a decade — and why he agreed to drop them in trade for a plea to crime that carried a far much less extreme punishment.
“I do know that there’s a lot of folks that may condemn me for taking a plea that solely permits them to go to jail for 3 years,” Gmoser mentioned, including: “To me, whether or not it’s in the future or six days or six months or six years or 60 years, it was extra vital to me to get justice by an act of contrition for Katelyn Markham.”
Carter’s protection workforce and household wouldn’t touch upon the plea settlement. Carter didn’t focus on the settlement at his sentencing; one in all his attorneys mentioned his consumer had taken accountability and duty for Markham’s loss of life.

In an interview with “Dateline,” Markham’s father, Dave, described the second he discovered of the deal as painful and surprising however mentioned he understood {that a} single juror may have halted a doable conviction had the case gone to trial.
“There was an opportunity John may stroll, and I didn’t need that,” he mentioned.
The evening she vanished
When she vanished, Katelyn Markham, a 21-year-old scholar recognized for her daring persona and inventive expertise, had dated Carter for 5 years, they usually had been engaged for one. They deliberate to maneuver to Colorado, and in a media interview shortly after she disappeared, Carter — then a Papa Johns pizza supply driver — referred to as her “the love of my life.”
In interviews with police, Carter supplied his account of their final evening collectively. A pal stopped by the Fairfield residence the place Markham lived earlier than Carter left for one more pal’s gathering, in line with video of an interview Carter gave to the Fairfield Police Department. Markham stayed residence, Carter advised authorities.
Carter mentioned that round 2 a.m., he went to his mom’s residence, the place he lived, and watched a favourite present earlier than he fell asleep round 4 a.m., in line with the video. When he hadn’t heard from his fiancée by the following evening, he mentioned, he panicked and dialed 911.
Detectives confirmed that Carter had been on the gathering, in line with notes from the police division’s case file, and on his pc they discovered he had watched episodes of “White Collar.”
Detectives believed Carter had been accounted for that evening, in line with a report on the case from the FBI, which Fairfield police had sought recommendation from.
But years later, an investigator in Gmoser’s workplace who was re-examining the case discovered causes to doubt Carter’s account.
Doubts start to emerge
One doable eyewitness account got here from two youngsters who have been in Carter’s neighborhood early Aug. 14, 2011, the evening Markham vanished. After her skeletal stays have been found on the dump web site practically two years later, on April 7, 2013, the teenagers contacted police and advised them that they’d seen one thing unusual at Carter’s residence, in line with summaries of their interviews within the case file.
They had sneaked out to go to a celebration, they mentioned, and round 2 a.m., two automobiles slowly pulled as much as Carter’s residence, together with one they acknowledged as Carter’s pink Ford, the file exhibits. Neither automotive’s lights have been on. Roughly 5 minutes later, one of many teenagers mentioned, Carter’s automotive emerged from the storage and the 2 automobiles drove off, in line with the file.
Rebecca Ervin, the lead detective who initially investigated the case, described their accounts as “suspect,” partly as a result of Carter’s pc exercise had established his whereabouts, in line with the file.

But investigators in Gmoser’s workplace uncovered particulars that challenged that ingredient of Carter’s account, as properly: Carter’s on-line search historical past from the day he reported Markham lacking indicated he’d been trying across the net for synopses of the exhibits he mentioned he’d watched, Gmoser mentioned.
Gmoser mentioned he believed Carter learn the summaries in an effort to construct an alibi.
When the investigators in Gmoser’s workplace re-interviewed the witnesses who mentioned they’d seen Carter’s pink Ford with out its lights on, they supplied the identical account that they had in 2013, and in Gmoser’s view, what they mentioned they noticed that morning was a essential piece of proof probably linking Carter to the case.
Ervin was “satisfied” that Carter wasn’t concerned, Gmoser mentioned. “She was unsuitable.”
Ervin, who nonetheless works for the Fairfield Police Department and has the rank of main, declined to talk with “Dateline” concerning the case. In an e-mail, Fairfield’s present police chief, Stephen Maynard, disputed Gmoser’s feedback.
Maynard mentioned Carter was by no means eradicated as a suspect, and he supplied what he described as a extra correct assertion: “Detective Ervin didn’t imagine there was enough proof to conclude Carter was liable for Markham’s loss of life,” he wrote.
‘She should die’
By early 2023, Gmoser believed his investigators and prosecutors had assembled a case in opposition to Carter that they thought wouldn’t get any stronger. On March 13 of that 12 months, a grand jury indicted Carter on homicide costs in Markham’s loss of life. He pleaded not responsible.
During a subsequent listening to in a Butler County courtroom, Gmoser revealed that investigators discovered disturbing poems in Carter’s journal: “Deep down I really like her,” he mentioned Carter wrote. “You need to kill her. But I really like her. She should die.”
And: “I do know I’ll bury the physique within the yard, no I’ll bury it underneath the trailer and wait till the grass grows over it an depart earlier than anybody reviews it lacking.”

In a search warrant unsealed that April, prosecutors recognized a doable motive in her loss of life. Even although Carter had described Markham because the love of his life, earlier than she disappeared Markham advised a pal that she was uninterested in her relationship and reconsidering the approaching transfer to Colorado.
“Someone inside John’s core group made the assertion to me that if Katelyn was to interrupt up with John, it will be catastrophic to John,” Paul Newton, lead investigator for the Butler County Prosecutor’s Office, advised “Dateline.”
Prosecutors additionally discovered {that a} onetime neighbor of Markham’s — their residences shared a wall when she disappeared in 2011 — recalled listening to an altercation in Markham’s condominium on the evening of Aug. 13, 2011. According to video of an interview Newton carried out with the girl, she mentioned she heard a lady shout “cease it” on the opposite aspect of the wall — then a thump.
Yet the entire proof investigators had uncovered was circumstantial. There was no forensic, eyewitness or video proof that supplied a direct hyperlink between Carter and Markham’s loss of life, Gmoser mentioned. Nor may prosecutors say a lot about how she was killed.
Even although Markham’s stays had been discovered and the medical expert’s workplace concluded she died by murder, the officers couldn’t decide a explanation for loss of life, in line with the case file.
A litany of questions remained, Gmoser advised “Dateline.” Was Markham killed in Indiana? Did she go there voluntarily? Did she depart her condominium on her personal?
“Those are all open questions,” he mentioned.
A responsible plea
Gmoser mentioned nobody in his workplace mentioned the potential of a plea take care of Carter’s attorneys. Weeks earlier than his trial was scheduled to start this summer time, a protection lawyer requested prosecutors whether or not they’d take into account permitting Carter to plead responsible to a third-degree felony — involuntary manslaughter, or inflicting one other’s loss of life by the use of a misdemeanor crime.
“I advised him take it,” Gmoser mentioned. “It was virtually that fast.”
He made the choice in only some minutes, Gmoser mentioned, but it surely was one thing that had advanced over months whereas he examined “every bit of circumstantial proof on how it will be attacked, how I’d’ve attacked it as a protection lawyer.”
“I knew what was coming,” Gmoser mentioned.
Because the statute of limitations on different doable crimes, like tampering with proof or desecration of a physique, had handed, manslaughter was the one out there cost his workplace may pursue as a part of the settlement, he mentioned.
Gmoser may have required Carter to supply an account of Markham’s loss of life. But that, Gmoser mentioned, would have prompted a negotiation. And he needed to make certain that prosecutors bought a responsible plea, he mentioned.
“I bought an acceptance of duty,” Gmoser mentioned. “I’ll take that.”