You've been at this "random car" thing over the whole thread.

But there no indication that these thieves can steal random cars in the sense of any car they choose. Thieves have stolen particular cars and the cops might not know the connecting thread but there's no situation where the thieves passed a "show us a random car and we'll use our device to steal it" challenge and that would be the kind of hard evidence you'd need for a "these guys can steel any car" rhetoric.