Did you really mean that? He may not have been a child, but he does sound like an innocent victim. If he were sufficiently mentally disabled he would get some similar protections to a child because of his inability to consent.
In other situations the person wouldn’t have access to a gun. Let alone a gun that encourages it to stage a mass casualty event.
Please recognize that this is coverage of a lawsuit, sourced almost entirely from statements by the plaintiffs and fed by an extremely spun framing by the journalist who wrote it up for you.
Read critically and apply some salt, folks.