In addition to the state's investigation, the town of Calvin plans to conduct its own investigation into Joe Don Chitwood's activities and how his performance as chief might have been affected if the allegations are true.

Kyle Lee Owens, a Cherokee Nation citizen, is charged with killing Stephen Lee Hill and Benjamin Maston Hill Jr., who were shot to death Friday at Owens' residence in Oktaha, about 15 miles southwest of Muskogee.

Terry Nathan Hindman, 17, faces up to 17½ years in prison under the terms of a plea agreement.

A U.S. magistrate judge approved an arrest warrant Monday for Daniel Thomas Giraldi, 44, an attorney who worked in the District Attorney Offices for District 13.