The Attorney General could do this on grounds that the coroner has refused or neglected to hold an inquest which ought to be held or the discoveryof new facts or evidence make it necessary for another hearing.
He has to persuade the court that it would be "necessary or desirable in the interests of justice" for the original inquest verdicts to be quashed - because, for example, of "the discoveryof new facts or evidence".
Since the lawsuit was filed, both sides of the dispute have held so-called "discovery" hearings, where preliminary testimony was taken to establish facts.