When 8-year-old Relisha Rudd disappeared from a homeless shelter in Washington, D.C. in 2014, nobody noticed. By the time authorities formally declared Relisha “missing,” 18 days had passed since she’d been spotted at school or the shelter where her family lived. Seven years later, Relisha has never been found. Through the Cracks investigates gaps in our society and the people who fall through them, and in this first season, host Jonquilyn Hill asks if Relisha’s disappearance was, as the city later claimed, unpreventable. From WAMU and PRX.