Blood or urine alcohol analysis includes thorough scrutiny of Preliminary Alcohol Screening (PAS) tests, blood draw videotapes, Chain of Command documentation as well as GC, GC/MS or LC/MSMS data (if applicable).  Our analysis will highlight any incorrect procedures for biological sample collection or storage,  skewed or ambiguous results from improper analysis or data interpretation by the toxicology laboratory. We have expert witness experience in several superior Courts of California and British Columbia as well as preparing successful written opinions in BC Canada for revoking IRP's- Immediate roadside prohibitions.