Michigan Criminal Defense Lawyer Blog

Retrograde extrapolation is the process of estimating a driver’s earlier blood alcohol concentration from a later test. In DUI and Michigan OWI cases, the calculation can appear precise, but its reliability depends on facts that are often missing.

Short Answer: Retrograde extrapolation in DUI cases is not a direct measurement of a driver’s BAC at the tim...

Short Answer

Michigan rape shield law, MCL 750.520j, generally prevents prosecutors and defendants from introducing evidence of a complainant’s prior sexual conduct, opinion evidence about sexual conduct, or reputation evidence about sexual conduct in criminal sexual conduct cases. The statute recognizes two narrow statutor...

Gas chromatography is the laboratory method often used to measure alcohol in a Michigan DUI blood test. Although prosecutors may present the result as a precise scientific number, the real question is whether the underlying data supports that number. In many cases, the most important defense work begins not with the final lab report, but with the chromatograms, calibration recor...