The suspect has been charged with "two counts of promoting anarchy"

25) Massachusetts: Slaying plot alleged at high school
    Boston Globe

"A Marshfield [MA] High School junior is under arrest on charges that
he plotted a murderous attack against eight individually named
students and teachers, mapped the school's escape doors that he
planned to padlock, and exploded a handmade bomb in a practice
session. Police said the 16-year-old student was possibly timing an
attack to coincide with the April 20 anniversary of the school
shootings at Columbine High School in Colorado. When detectives
searched his house, they found detailed, hand-drawn plans of the
school, a shopping list that included guns and ammunition, and
information from websites, including The Anarchist's Cookbook, that
would allow him to 'maximize casualties,' police said." (10/07/04)