The Missouri Court of Appeals, Southern District handed down an opinion that better explains the calibration of breath testing devices used in DWI cases. The court ruled that the annual certification of the device, which regulations state it be done “annually,” must be taken literally. Annually means within 365 days. The Court went on to say that the purpose of the annual test is to make sure that the BAC tester is accurate when used. The case is MICHAEL RAY SLEDD, Petitioner-Respondent, v. DIRECTOR OF REVENUE, Respondent-Appellant. Missouri Court of Appeals, Southern District – SD34272

Any other explanation such as how close to the use of the tester was the simulator certified, or how close to trial for an alcohol-related offense was the simulator certified is irrelevant. The court said that the circuit court erred when it excluded results of a breath test based on the certification of the stimulator. The case was remanded to admit the test results, then determine their credibility, and issue a new judgment.