Whether supergrass snitch Nicola Gobbo's police informing might topple dozens of convictions for major crooks in Victoria could be determined within weeks.
The first appeal by one of Australia's infamous tomato tin drug traffickers - jailed over the import of 15 million ecstasy pills in tomato tins imported from Italy - will be heard by Victoria's Court of Appeal in July.
Jan Visser has spent 11 years behind bars for the 2007 import, which was the world's largest ecstasy seizure at the time.
Australian Federal Police and Customs were behind the major bust, but the initial tip came from Victoria Police via Ms Gobbo, the prominent gangland lawyer turned police informer.
The double-dealer known as Lawyer X passed on shipping documents about the import to her police handlers, having been handed them by the plot's mastermind, Rob Karam.
She told police handlers she had grown close to Karam while working on his defence over a smaller 2005 plot and that he confided in her about his ongoing crimes.
He gave her documents for safe keeping including shipping information about a 4.4 tonne shipment of pills, stashed in tomato tins and shipped from Italy to Melbourne by the Calabrian mafia.
"Your fingerprints are already on (it)," he told her when she asked if the document could land her in trouble.
She passed copies of the documents to her handlers and helped investigators translate the information.
The tip was secretly passed on to the Australian Federal Police to cover up her involvement, but she was so deeply connected that when AFP officers exposed the plot they believed she was complicit.
Thirty-two people were jailed over the plot including Karam. Syndicate leader Pasquale Barbaro received a life sentence.
While most confessed and pleaded guilty, Visser fought the charges at a 2014 trial, unsuccessfully arguing he believed the import was tobacco, not MDMA.
He has previously failed in an appeal bid, and a petition for mercy was rejected last year.
New laws allowing additional appeals where there is fresh evidence mean Visser has another chance to plead his case, in a hearing on July 28-29.
Karam, Francesco 'Frank' Madafferi, Saverio Zirilli, Carmelo Falanga and Salvatore Agresta have also filed appeals over Ms Gobbo's role in their conviction for the import, while drug kingpin Tony Mokbel is appealing unrelated drug trafficking charges connected to his snitching lawyer.
Zlate Cvetanovski, convicted of drug trafficking on the word of one of Ms Gobbo's clients, was released on bail in May while he appeals. He's already spent a decade behind bars.
Faruk Orman had a murder conviction quashed last year after successfully arguing the prosecution case, which relied heavily on the evidence of another of Ms Gobbo's clients, had been tainted.
Australian Associated Press