Their evidence doesn't need to be irrefutable, only proven to be more likely than not based on balance of probabilities.
These are very serious allegations with supposedly millions of documents of evidence both in favour of their arguments and in our defence.
Add to that there's no actual official confirmation this is even over yet, the hearing may well still be ongoing.
What I'm saying is that those who know their onions on this stuff have said all along it'll take a while before we know any outcome, that hasn't changed.