What additional test may be conducted if BAC levels from an Intoxilyzer 9000 are disputed?

The blood test is often used to corroborate or dispute the BAC levels obtained from an Intoxilyzer 9000 result. This is because blood tests are considered to provide a more definitive measure of a person's blood alcohol concentration compared to breath tests, which can be subject to various factors that might influence results, such as the calibration of the device or individual physiological differences in the subject being tested. In situations where a driver contests the results of the Intoxilyzer 9000, authorities may opt for a blood test since it offers a higher level of accuracy and is less affected by potential variables.

Other testing methods, such as urine tests or field sobriety tests, may not provide the same level of direct estimation of BAC at the time of the test and are not as universally accepted in legal contexts as blood tests are. A breathalyzer retest primarily serves to reconfirm the breath test result and may not hold the same evidentiary weight as a blood sample collected under controlled conditions.