As a general rule, it’s a good idea to refuse a breath test if you ever find yourself pulled over on suspicion of drunk driving. The reason is that the breath test results often form the crux of the state’s DUI case against you. A breath test that indicates a BAC greater than .08 makes a difficult case to defend that much harder. Some people think they can avoid this trap by purchasing pocket breathalyzers. These devices, ranging from $10 to $300, are advertised as means of allowing you to test yourself before driving home.
Recently, one news organization put one such Breathalyzer, the BACTrack S80, to the test. The $150 device is advertised as providing “professional accuracy at an affordable price.”
The organization conducted a controlled experiment to determine just how accurately the device measured a person’s BAC. The test also served as a training exercise for officers to help them recognize signs of an impaired driver.
Four women and one man were served measured amounts of alcohol designed to bring their BAC close to the .08 legal limit. The participants self-assessed the amounts of alcohol served; guessing that they were given the equivalent of two or three drinks a piece. After each round of drinks, the participants were asked to blow into both the police breath test device and the BACTrack S80. Almost every time, the BACTrack S80 device had a lower number than the police authorized device. Overall, the BACTrack S80 consistently registered lower blood alcohol levels than police Breathalyzer device.
This difference was most pronounced after the first round of drinks, which could lead to a false sense of security. Believing that his BAC is lower than it really is, a person may choose to drink more than otherwise planned, causing him to be more intoxicated than he intended or believes himself to be. Or, given the false sense of security of having a low Breathalyzer number, he may decide to drive despite actually being impaired.
One of the officers who helped conduct the test stressed that the number itself was not important. The number is more of a proxy of impaired driving rather than proof of impaired driving. Officers look first for actions such as inability to maintain a driving lane as proof of intoxication. If a person is caught driving in a manner that indicates he’s impaired, he will get pulled over.
Charlotte Criminal Lawyer Blog


Two teenagers were involved in a crash that killed one, a 17 year-old-girl, and injured another, the 16-year-old driver. The driver, Garrett Prince, has been charged with multiple counts in connection with the crash, including “felony death by motor vehicle, driving while impaired, provisional DUI, careless and reckless driving, having an open container of liquor, speeding and possession of marijuana.”
Since the passage of North Carolina’s Laura’s Law in June by Governor Beverly Perdue, the courts have been tougher on drunk driving especially Hard Core Drunk Drivers (HCDD). The law is named for a North Carolina teenager who was killed by a drunk driver who had three prior DWI (Driving While Impaired) on his record. In the past, excessive offenders would be given an interlock device on their car which would force them to blow into a device before operating their vehicle. Research has found that with these interlock ignition devices, many of the offenders get a “blow fail” which means that at the time they were too drunk to operate the vehicle but still attempted to do it. The interlock ignition device is used for HCDD which are those offenders who are found to blow over a .15 BAC (.08 is the legal limit in NC).
Defending your
If you see blue lights come on behind your vehicle and it’s after midnight on about any day of the week, chances are the Officer stopping your vehicle is going to ask you if you have consumed any alcohol that evening. If he smells even the faintest odor of alcohol a Driving While Impaired investigation is almost certainly to follow. Hopefully after performing some routine field sobriety tests you will be allowed to get back in your vehicle and drive away, however, you may find yourself being placed in handcuffs and arrested.