Reporters could care less about the truth regarding the perp or anything else- all they are concerned about is whatever might be used to blame guns and inflame the "ban all guns" mantra.
It might be interesting to know what meds this autistic kid was on. Many if not most prior similar school massacres have involved Ritalin or similar psycho drugs. One of the commonly prescribed drugs causes agression-"risperidone can reduce repetitive and self-injurious behaviors, aggressive outbursts and impulsivity, and improve stereotypical patterns of behavior and social relatedness.(from wikipedia)"
In 2006, the FDA approved risperidone for the treatment of irritability in children and adolescents with autism.[6] The FDA's decision was based in part on a study of autistic people with severe and enduring problems of violent meltdowns, aggression, and self-injury; risperidone is not recommended for autistic people with mild aggression and explosive behavior without an enduring pattern.[7]