If you are on the jury in a drug trial, and if you are told that the defendant must prove that he/she knew nothing about the drugs, it is your civic duty to put the onus of proof back where it belongs (on the prosecution), raise it to the proper standard (beyond reasonable doubt), and reach a verdict accordingly.
presumption of innocence
The reversal of the onus of proof in drug-possession cases is incompatible with the rule of law and is therefore unconstitutional in all jurisdictions.
An Australian court finds that the existing drug laws, by reversing the onus of proof, violate the presumption of innocence. But all convictions stand. To any legislator who willingly allows the reverse onus of proof to continue, I say: May it please God that you become a victim of it. [From OpEdNews, USA.]