RAPID CITY, S.D. (AP) – A woman accused of using a screwdriver to fatally stab on man on the Pine Ridge reservation has pleaded not guilty to second-degree murder.

Forty-three-year-old Doreen Brown pleaded not guilty July in the death of 43-year-old Donald McMillan.

Oglala Sioux Tribe Police Chief Robert Ecoffey says the stabbing occurred at a home in Pine Ridge on June 27, and Brown was arrested by tribal officers before the case was handed over to the FBI.

Brown is being held without bail at the Pennington County Jail. A trial is scheduled for Sept. 10.