Columbus, Ohio, police have charged school bus driver Tia Denton with operating a vehicle while intoxicated. School officials became concerned when Denton was late dropping off elementary school students. They turned on her bus's GPS tracking device and saw she was missing stops. Meanwhile, someone called 911 after seeing her driving the bus erratically. Police say when she stopped Denton had an open container on the bus and blew almost three times the legal limit when they gave her a breath test.