Isaiah Marshall Harjo, a 28-year-old resident of Ada, Oklahoma, has pleaded guilty to two federal assault charges. The plea was announced by the United States Attorney’s Office for the Eastern District of Oklahoma.
Harjo admitted to one count of assault resulting in serious bodily injury in Indian Country and one count of assault with a dangerous weapon with intent to do bodily harm in Indian Country. Each charge carries a potential penalty of up to ten years in prison and a $250,000 fine.
According to court documents, the incidents occurred on September 25, 2025. On that day, Harjo assaulted one victim, causing serious bodily injury. He also assaulted a second victim using a dangerous weapon with the intent to cause bodily harm. Both offenses took place in Pontotoc County within the boundaries of the Chickasaw Nation Reservation.
The case was investigated by the Bureau of Alcohol, Tobacco, Firearms and Explosives along with the Ada Police Department.
Magistrate Judge Gerald L. Jackson accepted Harjo’s guilty plea and ordered that a presentence investigation report be prepared. Sentencing will be determined by a U.S. District Court Judge after reviewing the U.S. Sentencing Guidelines and other statutory considerations.
Harjo remains in custody with the United States Marshals Service while awaiting sentencing. The prosecution was handled by Assistant U.S. Attorney Lewis M. Reagan.
