A court in Melbourne ruled Friday that one of Australia's most famous drug kingpins must face a retrial after his defence lawyer was revealed to have been a police informant.

Tony Mokbel -- one of the key figures in Melbourne's years-long gangland war -- was handed a 30-year prison sentence in 2012 after pleading guilty to masterminding an elaborate drug syndicate.

Originally published on doc.afp.com, part of the BLOX Digital Content Exchange.