Nothing to investigate . Just look at the investigation into the banks .Prime Minister said it was a waste of time there was nothing to see, What is the point of proving what we suspected. If he held his ground a bit longer we would have saved a lot of public money and I am not just saying the Royal Commission but the damage to bank shareholders. A good tin foil hat theory is worth more than proof, and a lot cheaper
Also the rule. Never investigate something unless you know the conclusion , to do so otherwise is reckless , who knows what you may drag up