 Only by his initials, then 14-year-old A.B. was arrested in February after a schoolmate heard about a plan to attack the high school in the Cincinnati suburb of Mariemont. The Hamilton County prosecutor says the plan included shooting teachers and students, releasing a gas in the school, and kidnappings. In court Thursday morning, the teen pled guilty to a dozen counts of inducing panic to avoid being tried as an adult. His defense attorney argues A.B. has mental health challenges, is on the autism spectrum, and deserves treatment.