daughter , 7-year-old Somer Thompson , was found in a South Georgia landfill , Clay County , Florida , Sheriff Rick Beseler said Thursday . On Monday , Somer became separated from her siblings and schoolmates on her way home from school in Orange Park . She was seen in a fight at school before disappearing , according to a police report Thursday . Her 10-year-old sister told police that Somer had gotten into a fight with another girl at school earlier in the day . The sister said she brought up the fight while she and her brother walked Somer home from school , and that Somer ran off from them , apparently upset . The sister said she lost sight of Somer in a group of other kids leaving the school , according to the police report . A medical examiner in Savannah , Georgia , used dental records to identify the body positively as Somer 's , said Clay County Sheriff 's Office spokeswoman Mary Justino . The sheriff told the girl 's mother Wednesday night that her daughter had been identified . Thompson was devastated , he said . `` It was the hardest phone call
-LRB- CNN -RRB- -- The news was devastating , the aftermath surreal . Diena Thompson clutched a tissue in her right hand , frequently wiping her eyes as she told reporters that she could n't believe it was her daughter whose body was found in a Georgia landfill . Her visage revealed the weight of grief and a yearning for justice . Standing outside her home in Orange Park , Florida , Thompson looked into the camera and , with her voice cracking , sent out a stern warning to her daughter 's killer . `` I want you to know that I will not sleep until this person is found . I hope they get you , and I hope they make you pay for a long , long time . You do n't take from somebody . You did n't just take her from me . You took her from my family ; you took her from all these people . And you do n't do this to a little baby and put my baby in the trash like she 's nothing . That 's not OK , this is not OK . '' The body of her