Investigators allege the cocaine was hidden in plastic tubs buried under shipping containers. (HANDOUT/AUSTRALIAN FEDERAL POLICE)Investigators allege the cocaine was hidden in plastic tubs buried under shipping containers. (HANDOUT/AUSTRALIAN FEDERAL POLICE) Credit: AAPPolice lack evidence that a vulnerable man arrested during one of Australia's biggest ever drug busts knew he was handling cocaine, a judge has heard. The Liverpool man was arrested in June after he and another man were allegedly discovered at a property on Sydney's outskirts with 2.7 tonnes of cocaine. Federal police raided the Londonderry property and allegedly located the drugs in plastic tubs underneath shipping containers.