A policeman who went to jail for years warned he would "blow the lid" on the fatal 1973 Whiskey Au Go Go firebombing, an inquest has been told.
John Bargenquast - who was charged over stolen vehicles and thought his family would be arrested too - asked the police minister's press secretary to pass on a message to senior officers, the ministerial aide's two sons told the Coroners Court in Brisbane on Friday.
