While serving a 10-year sentence for conspiracy to commit murder, Rosebrook hired another hitman to kill the hitman who ratted him out, police said.

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“My family was being threatened, and I thought they were in danger,” he once told the Columbus Dispatch in a jailhouse interview. “It was a stupid mistake. I didn’t want to go through with it.”

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But his new hired gun hunted down, shot and killed the wrong person — Daniel E. Ott, a 31-year-old man with no connections to Rosebrook or his crime.

This story, prosecutors said, is tragically true.

After more than a decade, Rosebrook was convicted Monday of aggravated murder, among other charges, in the 2006 mistaken-identity murder of Ott, according to the Columbus Dispatch.

“This is the most complex investigation that I’ve ever seen, with some of the challenges involved, because the actual victim was totally unrelated to any of these people and because the mistaken identity really presented some challenges that we don’t see in other cases,” Ohio’s Geauga County Prosecutor Jim Flaiz said, according to the Geauga County Maple Leaf newspaper.

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Neither the prosecutor nor Rosebrook’s attorney could be be reached for comment.

One early morning in May 2006, police said, Rosebrook’s hitman, Chad South, disguised in camouflage and a ski-mask, invaded the home Daniel E. Ott shared with his girlfriend in Burton Township, Ohio.

The couple were preparing to move to Grand Rapids, Mich., where Ott, who worked in horticulture, had accepted a job, according to the News-Herald.

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“He moved his furniture up there already,” Ott’s father, Leroy Ott, told the local newspaper. “He was going to run a greenhouse for another company.”

Prosecutors later said that South realized he had the wrong man — the other Daniel Ott was more than twice his age, according to the Geauga County Maple Leaf newspaper. South, armed with a shotgun, started shouting at Ott’s girlfriend, telling her to “lay down” and “be quiet,” authorities told the News-Herald at the time.

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South duct-taped Ott to a chair and tried to flee the scene, but Ott broke free and the two started to struggle, prosecutors said, according to news reports.

Minutes later, Ott was shot in the chest, police said, and he died that morning at a hospital.

The Washington Post’s Abby Phillip reported last year that the killing shook the rural town:

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There was no robbery and no sign of forced entry. The mysterious murder shocked rural Geauga County, which hadn’t experienced a homicide in six years. The community was so unaccustomed to this type of crime that Ott’s girlfriend’s 911 call was never recorded, according to a 2006 Cleveland Plain Dealer story. The recorder, the newspaper reported at the time, was broken thanks to a wire that had probably been loose for months. It took six months for law enforcement officers to realize that there was no reason for Daniel Ott to have died that night. That is, except for the fact that his name was Daniel Ott.

It took even longer for investigators to build a case.

“Many people we would approach and engage in conversation said, ‘I know what you want; they will kill me,’ ” Geauga County Sheriff Daniel C. McClelland told The Post last year. “They were very intimidated.”

Rosebrook was released from prison in 2014, then arrested again the next year when three men were indicted in Ott’s killing — Rosebrook, his hitman and his brother, Carl “Jeff” Rosebrook, who authorities say was the moneyman.

“We’re working hard to protect witnesses that we do have,” McClelland told The Post last year. “To be quite candid, we are concerned that they would be killed.”

At trial, Rosebrook’s attorney, Henry Hilow, claimed that the prosecution had not presented any evidence connecting Rosebrook to the crime.

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Geauga County Assistant Prosecutor Jennifer Driscoll argued, however, that Rosebrook leaned on other criminals in prison. That’s where, authorities said, he met South and hired him to kill Daniel Ott.

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“There is no Angie’s List for contract killers,” she said in court, according to the Geauga County Maple Leaf. She added: “Not the brightest, but that’s what you have to work with because you don’t go and hire a contract killer off the classifieds.”

Two inmates testified that Rosebrook agreed to pay South $10,000 up front and another $10,000 after the murder, according to the newspaper.

Rosebrook’s brother, Jeff, would handle the cash.

“It was the reckless vendetta of the defendant who caused all of this, who caused the death of an innocent man,” Driscoll told jurors during the trial.

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On Monday, Rosebrook was found guilty of aggravated murder, kidnapping and conspiracy; his sentencing hearing is scheduled for next month.

Also next month, Rosebrook’s brother, Jeff, will face his own trial.

South was convicted earlier this year of murder and kidnapping and sentenced to a minimum of 28 years behind bars, according to the Dispatch.

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The victim’s parents, Leroy and Linda Ott, told reporters this week that they have waited a long time for justice to be served in their son’s death.

“We’re so happy with this verdict,” Leroy Ott told the Geauga County Maple Leaf.

“You know, it’s been 10 and a half years and people in this community — the detectives, the courts, everybody — worked so damn hard and this family was shown a lot of love and support from this community. They went above and beyond,” he added. “What more can you say? It’s not going to bring Dan back. We won’t ever have closure; I think about him every day. But we got justice and Dan would be happy.”

This story has been updated.