Ada Resident Pleads Guilty To Felony Assaults

MUSKOGEE, OKLAHOMA – The United States Attorney’s Office for the Eastern District of Oklahoma announced that Isaiah Thomas Billey, age 23, of Ada, Oklahoma, entered a guilty plea to two counts of Assault Resulting in Serious Bodily Injury in Indian Country, each punishable by a term of up to ten years in prison and a $250,000 fine.

The Superseding Indictment alleged that on May 2, 2025, Billey assaulted one victim, resulting in serious bodily injury.  The Indictment further alleged that on September 23, 2025, Billey assaulted a second victim, resulting in serious bodily injury.

The crimes occurred in Pittsburg County, within the boundaries of the Choctaw Nation Reservation, in the Eastern District of Oklahoma.

The charges arose from an investigation by the Pittsburg County Sheriff’s Department and the Federal Bureau of Investigation.

The Honorable Jason A. Robertson, U.S. Magistrate Judge in the United States District Court for the Eastern District of Oklahoma, accepted the plea and ordered the completion of a presentence investigation report.

A U.S. District Court Judge will determine the sentence to be imposed after considering the U.S. Sentencing Guidelines and other statutory factors.

Billey will remain in the custody of the United States Marshals Service pending sentencing.

Assistant U.S. Attorney Lewis M. Reagan represented the United States.