Read variations on this story a few times and it usually involves there being a mixup or whatever and someone “drinks” to “excess” but its not actually spiked or alcohol or anything psychotropic and they end up making an ass out of themselves and everybody else knew they didnt actually drink.
Are they faking or did they experience an honest placebo experience or something else crazy?
Something something cultural expectations
Like all legal questions, depends on the location but to answer the question generally, yes they could be charged with DUI if they fail a field sobriety test. Which doesn’t always include / require a test for BAC specifically.
But if they drug tested them and there was literally no trace of substances nor alcohol and yet they’re driving while “smashed”. Law is very interesting, reminds me of the auto-brewer guy