No! Like any machine, breath tests are not 100 percent accurate. Most prosecutors accept this margin of error when considering whether to take a DUI case to trial. (For example, if the defendant blew a 0.079, this will not be a strong case at trial because the margin of error can put the defendant’s actual breath alcohol level even further away from 0.08.)
Your defense lawyer has the opportunity to challenge the accuracy of any alcohol testing. They can question the manufacturing of the machine, the technician who operated the machine, the lab that processes alcohol results, or the chain of custody of a blood or urine sample. Errors can happen at any step of the investigative process.
You have the right to hire a lawyer to prove these mistakes to the jury. Remember, the police and prosecutor are trying to get a conviction, so they do not have to voluntarily tell the jury that alcohol tests are not 100 percent accurate every single time.