15-year - old , allegedly planning , carrying out murder of 9-year - old . Jessica Olten disappeared after returning home from her house in Missouri . 15 , 9 , and suspect had been together before , police spokeswoman says . Judge will be deciding whether to charge suspect as an adult or juvenile .
15-year-old suspect accused planning , carrying out murder of 9-year-old . Elizabeth Olten disappeared after returning home from friends house in Missouri . Olten , 9 , and suspect had played together before , family spokeswoman says . Judge will be deciding whether to charge suspect as an adult or juvenile .