Hey nice write up on your time in Melbourne!
That seagull is not to be messed with.
In Melbourne you need to know, they are a very organised gang.
That bag of money was likely a payoff but probably didn't satisfy the gang leaders so they took that person away for some roughing up.
You did the right thing to leave it, you don't want trouble with seagulls.
All the best in Mildura!