The judge said the authority was entitled to draw an adverse inference in the circumstances and he also cited a complaint from witness Jacqui Graham, who described seeing a "staggering and unbalanced" man standing near wine shelves when she walked into the store.
Judge Moore cited Jacqui Graham's evidence of the man's intoxication and how he had served himself at the self-service checkout. She has worked extensively in community drug and alcohol anti-dependency services and programmes, he said.
"Mrs Graham saw the man picking up wine but assumed he would not be served because it was plain to her that he was drunk," Judge Moore said.
She told an assistant: "You can't serve that man intoxicated. It's against the law and he's really drunk. If he goes out and kills someone it will be your fault."
The young assistance had looked flustered and said she did not know what to do. By this time, the man was leaving the supermarket.
Countdown claimed the authority had reached a conclusion which it could not have reasonably come to, based on the evidence. Countdown argued that had the authority correctly applied the standard of proof, there was insufficient evidence available for it to conclude that the customer in question was intoxicated by alcohol.
The judge cited the definition of intoxication which requires the person to be observably affected by alcohol: "While it is perhaps possible that what Mrs Graham observed was in fact a psychiatric or neurological presentation, I am not satisfied that this is a reasonable possibility having regard to all of the circumstances," the judge wrote.
The police were entitled to costs, he decided.