(Hillsboro, OR)  --  Authorities say a suicidal woman shot and killed herself after firing at Washington County sheriff's deputies who arrived to help.  Deputies were dispatched around 12:30 yesterday afternoon to the area of River Road and Minter Bridge in Hillsboro after a report of a suicidal woman.  Investigators say the 57-year-old Hillsboro woman eventually shot herself to death.  Officials say a deputy caught either a bullet or a piece of shrapnel, but is expected to be fine.