I think she was principled faz.
She cannot overrule Taylor as you seem to think.
There is no evidence she covered up or overruled Taylor. In fact ttaylor set the rules before the enquiry started e.g no evidence after three fifteen which was a stich up as we saw from June 2012'.
its was stefen popper who put the 3-15 cut off point , stan covertly a government and a PM can do what it likes .