he was a math teacher. 14-year-old freshman philip chisem, student, has been charged with her murder. lemon is out front in danvers. >> reporter: this is the face of an accused killer. >> the defendant before the court is 14. >> the fact he is arraigned in adult court. >> reporter: investigators in massachusetts allege that the 1-year-old killed 24-year-old colleen ritzer where she taught and he was a opportunity quiet. kept to himself. new to society. he's a good kid. didn't seem anything bad. nothing out of the ordinary. just a quiet, normal kid. >> reporter: students and family members say ritzer loved being a teacher. at times sending out homework assignments over twitter, facebook and her blog. >> wonderful lady. couldn't say enough about her. she was always the teacher to go the extra mile and for students. >> reporter: why would anyone, let line a student, want to kill her? allegedly dumping her body in the woods behind her own school. >> i think that their sense of security starts to become shattered. and they all just said this is danvers. it doesn't happen here. >> reporter: