SPOKANE VALLEY, Wash. -

A 15-year-old girl is facing felony charges for allegedly making a threat at Central Valley High School on March 20.

Deputies arrested the girl, who has not been identified, Tuesday morning.

The discovery of the threat last Wednesday led to the evacuation of the campus and cancellation of school for the rest of the day.

Sheriff's deputies, supported by Fairchild AFB K-9 teams, swept the school and did not find any suspicious device to back up the credibility of the threat and school resumed the following day.

Deputy Cole Speer has been investigation the case and determined that the 15-year-old reportedly made the threat because she was not prepared for an assignment that was due in one of her classes.

She was booked into the juvenile detention center Tuesday morning.