Smashed at close, page-144

Very valid point, it is all about the evidence and rules of evidence in the State of Queensland. We can only deduce things from official sources: not all media is reputable in Australia:
The words issued by law enforcement "injuries incompatible with life" have technical legal meaning in the State of Queensland, as I understand it.
Does not sound good on the face of it.
Law enforcement cannot at this time provide anyone including the Coroner with a legally justifiable cause of death beyond the fact that four people were fatalities.