This raises the enormously complex questions about culpability, blame and punishment. All one can say is that such people are dangerous to the rest of us, so some form of exclusion, in prison, psychiatric hospital, secure accommodation or whatever is essential. Those who work later towards having them released face a huge responsibility. Will they continue to be a danger? How can anyone know? No matter how much one pities these lads,(and I for one do) we can't risk freeing them unless we're sure they're not a threat, and we'll never be sure.