Queensland State Coroner Terry Ryan will hold a second pre-inquest conference in Brisbane on Tuesday into the December 2022 killings.
Counsel assisting Ruth O'Gorman KC told the previous conference in November that investigators were still pursuing a line of inquiry and parties to the inquest should have reports on their findings within the next four months.
The inquest will probe what missing person information NSW Police provided about Nathaniel Train. (HANDOUT/NSW POLICE)
Constables Matthew Arnold, 26, and Rachel McCrow, 29, were wounded then fatally shot at close range within 10 minutes of entering a Wieambilla property for a welfare check on a missing person.
The three suspects in the shooting, Gareth Daniel Train, 47, Nathaniel Charles Train, 46, and Stacey Jane Train, 45, also lit fires in an attempt to flush out a female officer who escaped being shot after taking cover.
The Trains' neighbour Alan Dare, 58, was shot dead when he attended the property to investigate the fire.
The interested parties, which include the Queensland Police Union, the families of the deceased officers and SERT members, have provided to the coroner lists of concerns and issues they would like raised during the inquest.
The Coroners Court has listed 23 issues and concerns, including what information NSW Police provided concerning a missing persons report on Nathaniel Train that prompted Queensland officers to attend the property.
The inquest will also investigate Nathaniel Train's illegal entry to Queensland during the COVID-19 NSW border closure and the family's source for the firearms and ammunition.
Mr Ryan and his staff visited the property in remote farmland and attended an on-site briefing by police Ethical Standards Command investigators in October 2023.
The Coroners Court itself has tentatively booked four weeks from July 29 to August 26 for inquest hearings.
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