Former McGowan Government media adviser Steve Kaless has launched a defamation case against the Premier, the Treasurer and several government staff members after his acquittal on a charge of indecently assaulting a female colleague at a Christmas party last year.
Mr Kaless resigned after the accusation was made public, but was cleared at a Magistrates Court trial in August of touching the woman's bare bottom by putting his hand up her dress at the party.
In his Supreme Court writ, lodged this week, Mr Kaless also named Mr McGowan's chief of staff Guy Houston, media adviser Daniel Pastorelli and former DPC director-general Darren Foster among the defendants.
He alleged that, along with the complainant in the indecent assault case, they had conspired against him with the intent of injuring him.
He also alleged Mr McGowan made a defamatory statement about him to the media last year.
He is seeking damages, including for lost income.
Mr Kaless's statement of claim, which provides more detail of the allegations, cannot be made public because of rules that prevent certain documents from being released in defamation cases.
Mr McGowan is also defending a defamation action from mining magnate Clive Palmer, and has launched a counteraction in that case.
