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. >> reporter: from boston area poet ralph waldo emerson, to know one life has breathed easier because you have lived. it was after the grief and emotion here, hundreds of people expressing their feelings about this beloved teacher. as for the student facing murder, he's being treated as an adult. >> all right. ron allen in massachusetts on this story this morning. thank you very much. >> three of colleen ritzer's closest friends are with us right here. good morning to all of you. >> good morning. >> this is such a sad story. the more we learn about colleen, the more we know the world has lost a really wonderful person. you've known her since kindergarten, jennifer. what would you want people to know about her? >> i just want people to know how special of a person she was. she was my best friend in the whole world. and knowing her made my life so much better. she made everyone's life better. >> dan, this is such a shock. had you ever heard her talk about any problems with a student at school, any worries at school? >> no. you know, of everyone i've ever known in my life, she is the las