(Attleboro, MA)--A Woonsocket man is in custody for allegedly stalking his ex-girlfriend in Mansfield, Massachusetts.Police say Tu Le recently broke into Mansfield High School and Qualters Middle School several times to keep track of his ex, who is a teacher, and allegedly put GPS tracking devices on the woman's car.Le, a medical lab researcher at Brown University, is being held without bail pending a dangerousness hearing in district court in Attleboro, Mass.