A judo fighter who tested positive for marijuana claims he was fed a hash brownie by a member of his family.
American Nick Delpopolo says he was given the brownie but had no idea it contained marijuana.
He then slept through a four-hour drive, which he put down to be tired from training and travel.
A family member has written to US Olympic officials to try and claim responsibility, saying it never would have crossed Delpopolo's mind that it was a hash brownie.
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