Two teenagers have been charged with attempted murder and conspiracy to commit murder after allegedly plotting a mass shooting at a central Indiana high school that one of them attends. The two teens charged as adults in the case are 17-year-olds from Indiana and Mississippi. Law enforcement officials says the two communicated over social media about a mass shooting at the school in Shelbyville. The investigation began in December when the mother of one of the teens approached sheriff's police about her daughter's obsession and discussion of school shootings and her fear she meant to harm someone.