I’ve written repeatedly in the past about the inaccuracy and unreliability of the various breath machines used to estimate blood alcohol concentrations.  See, for example, How Breathalyzers Work (and Why They Don’t), Why Breathalyzers Don’t Measure Alcohol and Breathalyzer Inaccuracy: Testing During the Absorptive State.   Yet, our MADD-influenced laws increasingly ignore scientific evidence and rely upon these machines to [...]

Read the complete post at http://www.duiblog.com/2008/05/28/breathalyzers-accurate-beyond-a-reasonable-doubt/