MO HB2627

Repeals and replaces section 577.037 RSMo governing admissibility of blood alcohol chemical test results in DWI criminal trials, license suspension proceedings, and ordinance violations

Establishes that blood alcohol content of 0.08% or more constitutes prima facie evidence of intoxication; results below 0.08% require dismissal with prejudice unless the court finds exceptions apply (unreliable timing, controlled substance involvement, or substantial witness evidence of intoxication)

Creates retroactive admissibility for breath test results from offenses occurring between December 30, 2012 and April 4, 2014, if simulator solutions used to calibrate breathalyzers had vapor concentrations within 5% of 0.10%, 0.08%, or 0.04%

Explicitly overturns Missouri court rulings in Stiers v. Dir. of Revenue (Mo. Jan. 12, 2016) and Stiers v. Dir. of Revenue (Mo. App. E.D. Jan. 27, 2015) that had excluded certain breath test evidence

Includes an emergency clause declaring the act takes effect immediately upon passage to protect public safety from intoxication-related offenses