The chair of an inquiry which made damning findings against the ACT's former top prosecutor made "numerous communications", including 55 phone calls, to journalists from The Australian.
These communications, some of which occurred during the probe, are alleged to have caused an "apprehended bias".
Shane Drumgold SC, who resigned as director of public prosecutions after being slammed over his conduct in the case against former Liberal Party staffer Bruce Lehrmann, launched legal action in August last year.