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The last of nine defendants was sentenced today for the kidnapping and murder of Jolene Walker Campbell, an Osage Nation citizen, announced U.S. Attorney Clint Johnson. 

U.S. District Judge Gregory K. Frizzell sentenced Tre Robert Allen Ackerson, 30, Webb City, Missouri for Murder in the Second Degree. Judge Frizzell ordered Ackerson to be sentenced to 600 months of imprisonment, followed by five years of supervised release.

“I hope the family of Ms. Campbell can find some sort of healing knowing the person who murdered their loved one will likely die behind bars,” said U.S. Attorney Clint Johnson. “The Justice Department will continue its relentless efforts to seek justice on behalf of missing and murdered Indigenous people.”

According to court documents, Ackerson kidnapped and violently murdered Jolene in July 2020. The victim’s body was found in a remote field in Mayes County. The investigation showed that Jolene was robbed and kidnapped in Missouri and driven into the State of Oklahoma, where she was murdered by Ackerson.

Ackerson and several of the defendants used physical force or threatened the use of physical force against four witnesses in separate incidents. Various assaults on witnesses took place that included witnesses being kidnapped, restrained with zipties, blindfolded or having their eyes duct taped shut, being shot at, and being beaten. The acts were committed to prevent the witnesses from testifying or as retaliation for communicating to law enforcement about Jolene’s murder.

The additional defendants sentenced in this are as follows:

• Sarah Michelle Humbard, of Joplin, Missouri, was sentenced in Oct. 2023 for Tampering with a Witness, Victim, and Informant by Using the Threat of Physical Force. U.S. District Judge Raul M. Arias-Marxuach sentenced Humbard to five years of probation.
• Chloe Louise Stith, of Carthage, Missouri, was sentenced in Nov. 2023 for Tampering with a Witness, Victim, and Informant by Using the Threat of Physical Force. U.S. District Judge Gregory K. Frizzell sentenced Stith to 87 months of imprisonment, followed by five years of supervised release.
• Breanna Lynn Sloan, of Joplin, Missouri, was sentenced in Jan. 2024 for Kidnapping Resulting in Death. U.S. District Judge Gregory K. Frizzell sentenced Sloan to 240 months of imprisonment, followed by five years of supervised release.
• David William Morris, of Joplin, Missouri, was sentenced in Nov. 2023 for Tampering with a Witness, Victim, and Informant by Using the Threat of Physical Force. U.S. District Judge Gregory K. Frizzell sentenced Morris to 65 months of imprisonment, followed by three years of supervised release.
• Morgan Lee Bowman, of Joplin, Missouri, was sentenced in Mar. 2024 for Tampering with a Witness, Victim, and Informant by Using the Threat of Physical Force. U.S. District Judge Gregory K. Frizzell sentenced Bowman to 46 months of imprisonment, followed by five years of supervised release.
• Megan Louise Detherage, of Joplin, Missouri, was sentenced in Mar. 2024 for Misprison of a Felony. U.S. District Judge Gregory K. Frizzell sentenced Detherage to time served, followed by one year of supervised release.
• Jacob Ryan Scribner, of Joplin, Missouri, was sentenced in Apr. 2024 for Conspiracy to Retaliate Against a Witness, Victim, and Informant. U.S. District Judge Gregory K. Frizzell sentenced Scribner to 48 months of imprisonment, followed by two years of supervised release.
• Lane Ryan Bronson, of Joplin, Missouri, was sentenced in Mar. 2024 for Tampering with a Witness, Victim, and Informant by Using the Threat of Physical Force. U.S. District Judge Gregory K. Frizzell sentenced Bronson to 228 months of imprisonment, followed by five years of supervised release.

The FBI, Mayes County Sheriff’s Office, Muscogee Nation Lighthorse Police Department, and the Joplin Police Department conducted the investigation. Assistant U.S. Attorneys Justin Bish and George Jiang prosecuted the case.