Roberts Law Group, PLLC
North Carolina Criminal Defense Attorneys

On March 13, the North Carolina Supreme Court announced that courts throughout the state would close for at least 30 days, in an effort to protect public safety amid the Covid-19 outbreak. Roberts Law Group will remain open during this time. We are available to meet with new and existing clients in-person or on the phone. Please call our law office to schedule a time to meet.

We FIGHT For Your Future
We FIGHT For Your Future

How often should police calibrate their Breathalyzer devices?

A Breathalyzer device does not always render an accurate test result. In fact, the result will be particularly inaccurate if police fail to calibrate the Breathalyzer properly. For this reason, test results rendered by an inappropriately calibrated breath test devices are sometimes thrown out and cannot be used as evidence against a drunk driver during his or her criminal proceedings.

North Carolina DWI defense lawyers who understand the calibration standards that apply to Breathalyzers can use this knowledge to assist their clients and -- in some cases -- they can seek to have breath test results invalidated during trial proceedings. Here are the most basic calibration standards defendants should understand:

  • Police must maintain a list of acceptable breath test devices, and the Breathalyzer device used to test the defendant must appear on this list.
  • Police must adhere to a regular testing and maintenance program that applies to the breath device used to test the defendant.
  • The police officer who administered the breath test must have been appropriately certified to use the particular device that measured the defendant.
  • The police officer who administered the test must have administered it in a way that followed his or specific training received.
  • The officer who administered the breath test needs to make sure that the defendant did not burp or regurgitate during testing -- and did not smoke, vomit or eat -- for a specific amount of time before testing.
  • The breath test needs to take at least two readings that were within .02 percent of each other.

If you suspect that the police did not adhere to the above or some other Breathalyzer test standard, you might want to look deeper into whether your breath test results were accurate. If you can call the accuracy of your breath test results into question, getting this evidence thrown out during your criminal trial could assist you in your DWI defense.


years of
combined experience

Super Lawyers | Rising Stars 4

attorneys selected to
Rising Stars
between 2019 and 2021

Martindale-Hubbell | AV Preeminent | Peer Rated for Highest Level of Professional Excellence | 2020 3

lawyers rated
through Martindale-Hubbell*

Martindale-Hubbell | Client Champion | Platinum | 2021 4

years our founder has received the Client Champion – Platinum award by Martindale-Hubbell*

Payment Plans Available, Call Now! Visa | MasterCard | American Express | Discover Network

Client Reviews

Get Legal Help Now
Let Us Help You

Put our team of criminal defense lawyers on your side today. You are one phone call or email away from getting your questions answered by an experienced defense attorney.

Call us at 877-880-5753 to set up a free consultation or send us an email.

Fill out the form below for a Free Consultation.

Bold labels are required.

Contact Information

The use of the Internet or this form for communication with the firm or any individual member of the firm does not establish an attorney-client relationship. Confidential or time-sensitive information should not be sent through this form.


Call 877-880-5753 to schedule a free initial consultation.
Offices open weekdays 8am - 7pm, Saturdays 9am - 5pm