(Spokane, WA)  --  A nine-year-old boy is being detained on felony charges after being accused of assault with a deadly weapon.  Police say the boy walked by the victim's Spokane apartment Friday night and started yelling at her and using racial slurs.  Authorities say the boy displayed a box cutter and was walking toward the woman when the victim's nephew intervened and took the box cutter from the boy.  Police say the charge of assault with a deadly weapon is the boy's third felony.