Madison police say a Toki Middle School student was taken into custody and transported to the Juvenile Reception Center for bringing a B-B gun to school Tuesday. School officials say school staff members received a tip around 8:30 A-M that the 13-year-old boy potentially had a weapon. Following the tip, officials checked his backpack and discovered the B-B gun. The student is facing tentative charges of possession of a dangerous weapon on school grounds.