With the expansion of our staff we can now give expert advice with calculation of BAC (blood/breath alcohol concentration) in cases of alleged laced drink and hip flask defences.
BAC calculations are made to determine a subject's likely alcohol concentration from a given consumption of alcohol. Concentration can be calculated at the time of a substantive test, or the time of an incident.
Technical defences commonly involve a 'laced' drink or 'hip flask' defence. In the former, a calculation will determine the effect on a substantive test result of alcohol unknowingly consumed. Hip flask cases involve calculating the effect of alcohol consumed after an incident, e.g. a road traffic accident. Such calculations may show that a subject would have been below the prescribed limit if the additional alcohol had not been consumed.
Calculations can also be made in cases of drunk in charge i.e. where an individual did not intend to drive until their alcohol level dropped below the prescribed limit. If the individual provides a time when he/she intended to drive again, a calculation can be made to determine their likely BAC.