Writings about the alleged plot and dangerous materials have been seized, Tampa Police Chief Jane Castor was quoted as saying by Xinhua.A 17-year-old boy, Jared Michael Cano, was arrested after police got a tip-off from an anonymous caller. Reports said the student planned to kill at least 32 people, including two principals at the Freedom High School.POlice said they found a manifesto with Cano's minute-to-minute plan for the massacre, detailing each murder he intended to commit.Cano has been charged with threatening to throw, project, place or discharge a destructive device. He also faces charges for possession of bomb-making materials, cultivation of marijuana, possession of drug paraphernalia and possession of marijuana, police said. [More]Tags:uswoman killed