In the summer of 1976, Betsy Bailey was at a bicentennial concert in Concord when she heard a familiar voice call out to her. “Hey you!” the person said from above. Bailey looked and saw her carefree younger sister, Simone Ridinger, up in a tree. “I didn’t know she was going to be there,” Bailey […] The post Simone Ridinger was 17 when she disappeared after a shift at a Natick restaurant. What happened? appeared first on Boston.com.