Some odd points about that case,
1) Why smuggle marijuana from Australia into Bali when grass is cheaper to buy it in Bali?
2) A 4.2 kg weight of grass is a bulky packet, it stinks like hell and can't be hidden in a boogy board bag without being noticed.
3) The bag was checked in<5kg overweight by Quantas at Brisbane, flown via Sydney to Bali arriving there< 9.2kg overweight.
4) A minimum of 9 people handled that unsecured bag during check in and transport and no one noticed the smell of marijuana.
5) The boogie board bag was the only bag not scanned out of all the luggage checked in, the scan ticket got "lost".
She was set up.
When she arrived in Bali the focus was on her.
That gave another mule the chance to slip through with something far more profitable, cocaine.