Section 86 Determine Lab Error Rate on Entire Run of Gas Chromatography/Mass Spectrum

• Library: DWI Experts and the Science of Chemical Tests 2014

The crime lab director or witness will say that the GC/MS is accurate to +/- 5%. This is true some of the time. Often, if counsel, by way of discovery, gets the data from the entire run of samples and not just the subject, a higher error rate is shown. This is why, in discovery, counsel must insist and fight for the entire run of the GC/MS that contained the subject’s test. Error rates of 20%–30% are not uncommon. This is still less than breath testing error rates, but getting this data is significant to...