Blessed with a Friday off school, 15-year-old Alyssa Bustamante dug two holes in the ground to be used as a grave, authorities said. For the next week, she attended classes, all the while plotting the right time for a murder, they said.
That time arrived the evening of Oct. 21, when Bustamante strangled 9-year-old neighbor Elizabeth Olten without provocation, cut the girl's throat and stabbed her, prosecutors said. Why?
