Comparing roadside with subsequent breath alcohol analyses and their relevance to the issue of retrograde extrapolation.

@article{Gullberg1992ComparingRW,
  title={Comparing roadside with subsequent breath alcohol analyses and their relevance to the issue of retrograde extrapolation.},
  author={Rod George Gullberg and Andy McElroy},
  journal={Forensic science international},
  year={1992},
  volume={57 2},
  pages={193-201}
}
Driving while intoxicated (DWI) legislation requires proving the critical breath alcohol concentration (BrAC) at the time of driving. With time delayed analysis, retrograde extrapolation is occasionally employed but has several uncertainties associated with it. The present study attempts to address whether subjects actually arrested for DWI are likely to have BrAC values near the time of driving differing largely from those performed at a subsequent time. Selected officers arrested n = 161… CONTINUE READING