The logistics of that got me thinking if there was perhaps instrumentation errors that led to that BAC number. It seems implausible, and not data-centric enough to hang your hat on in a blog post like this.
Depending on the incentive situation instrumentation errors may be the norm and not the exception. The NJ state police got in trouble for that in the past few years. If the calibration error isn't linear and someone shows up blowing a high number you could get a medically insane number on the screen.
