Since the British judicial system won't apply the appropriate penalty and just put a fucking bullet into Cox' vile brain, one hopes that the description of the "indeterminate" sentence is merely euphemistic, that he can and will rot in some moldy concrete hellhole, broken and alone.
What's really interesting from the forensic investigation viewpoint is how sophisticated these fuckers are, and (presumably, since authorities didn't disclose specifics) brazen in abducting children. It's an impossibly dark, alien side at work there, one that can hardly be described as human, and thus gets quickly forgotten or discarded as something too abhorrent to be recognized as conspiratorial. But it was exactly that, what Cox and Mackintosh and their evil associates engaged in, a collaborative, secret effort, literally a worldwide network.
Someone made money from this shit, and it wasn't some douchebag living in a bedroom in his parents' house and working at the family microbrewery. Mackintosh is described as "a manager at a video streaming company owned by the Italian Internet company Tiscali", and you have to wonder how many more Mackintoshes and how many more Tiscalis there are, in places with less sophisticated or less scrupulous detective work, but the same level of access to the internets, and nastier organized crime groups. As human trafficking becomes a more recognized issue across Eastern Europe and Asia, the law enforcement tactics appear to be getting more and more refined, and hopefully the penalties are commensurate with the crimes as well. Fuck these bastards.