 A judge has acquitted a teen who authorities say had planned to shoot up South Portland High School. The former defendant is 17. He had been charged with one count of solicitation of murder for trying to recruit others and one count of arson. Judge Peter Darvin acquitted the teen of the solicitation charge but upheld the arson count and will sentence him as per juvenile law. Judge Darvin earlier rejected prosecutors' request to have the teen charged as an adult.