He was originally charged with conspiracy to commit murder. On Friday, Circuit Judge Hubert L. Grimes sentenced him to probation, which could last until he turns 19. He was accused of making threats on MySpace, where his page showed a tombstone, satanic references and admiration for the shooters in the 1999 massacre at Columbine High School in Colorado, authorities said. Through instant messages on MySpace to another student, he also threatened to lock the cafeteria doors during one of the lunch periods and shoot everyone inside, authorities said.