From my point of view , VICPOL has given a huge amount of information I mean...

what more can they say out of court? VICPOL has said her manner of death was murder, at a particular place at a particular time, by a particular person. Even, VICPOL said, even telling the public that she was 'attacked', and ' not a hit and run event'..These are huge gulps and buckets of info.
Everything VICPOL says has to be backed up in court under cross examination by the defence, no point in arguing a case in the newspapers, which AU 'journalism' is euphemistically called. That would defeat the purpose of bringing justice for Mick and his family. So VICPOL is not going to run their case out of court. Mrs Murphy is owed that.
If VICPOL needed any public intervention, or information it would ask, clearly and concisely. At this point, the general public can take it as given that anyone the 'newspapers' are not interviewing will be either prosecution or defence witnesses, or even be for one and testify for the other, but be barred from speaking to the press, as the press is barred from interfering with their testimony..... honestly, the info is not limited, we have a lot more info than most motiveless murders are usually provided...