Appearing before the ICAC on 14 October 2020, Maguire admitted that he used his position as a Member of Parliament and as a Parliamentary Secretary to make money for himself and his associates. Appearing before the same ICAC inquiry, Gladys Berejiklian, then Premier of New South Wales, agreed that she had been in a "close personal relationship" with Maguire from 2015 until August 2020.
Maguire admitted to ICAC on October 14, 2020, that he abused his parliamentary roles for personal gain. Similarly, Gladys Berejiklian, then NSW Premier, confirmed a private relationship with Maguire from 2015 to August 2020.