According to the Federal Bureau of Investigation, in 2011 alone, the most recent year for which statistics were reported, there were more than 1.2 million people arrested on charges of DUI for alcohol or drugs. It is likely that methods, including the administration of breath tests, were used in many of these cases in order to determine a driver’s blood-alcohol content level and whether or not they should be arrested. Due to inaccuracies in the results from these types of tests, however, innocent motorists may find themselves under arrest for DUI.
Breath tests are performed using a machine that tests for the presence of alcohol in a person’s breath. In order to determine the blood alcohol content, which is what is actually used to indicate whether or not a person is intoxicated, the breath alcohol content is converted to blood alcohol content using a standardized formula.