I dont see the police looking further into this. What would be the point? If it wasnt nrl players it would of been a 1 paragraph article at the back of the newspaper.
Essentially it would read "13 people who were isolating and known not to have covid got together for a party, no one got covid, police fined them for breaching public health rules.....the end" pretty boring read.
As the police said this matter is closed, i doubt they will divert resources to make a task force, as what other laws were broken? Just the amount of people at home, would police really go to all the trouble of investigating if no covid is present so they can slap a few more fines on people? Now if they were travelling to another state within 14 days THEN i could see it being an issue with those other states.