Section 88 Check Calibration Records

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

If the crime lab performs its GC/MS tests correctly, those tests should be performed in the run on several calibrators over a broad range of values. Counsel needs to get the entire run data and closely look at the performance of the GC/MS when testing the calibrators. The actual chronograms must go under analysis by the expert.

In a close case, this can be a successful challenge. For example, the calibrators were a 0.04% and a 0.15%. If discovery shows that the 0.15% calibrator read high at 0.154%, an argument can be made that the 0.08% test was as much as...