Not every DWI charge in New Mexico is treated the same way. A charge can escalate to aggravated DWI, or reach the felony level entirely, depending on the facts of the arrest and how many prior convictions someone has. These are the highest-stakes DWI cases the courts see, and they demand a defense that understands exactly where the escalation points are.
Under NMSA § 66-8-102, a DWI becomes aggravated in one of three ways: a blood alcohol content of 0.16 or higher within three hours of driving, causing bodily injury to another person while driving impaired, or refusing chemical testing when the court finds evidence of intoxication from other sources. A conviction for aggravated DWI carries a mandatory minimum of 60 consecutive days in jail, a minimum that cannot be suspended or deferred. A fourth DWI conviction is a fourth-degree felony under New Mexico law, carrying an 18-month sentence with 6 months that must be served and cannot be suspended, along with a lifetime ignition interlock requirement.
This is a different case than a straightforward first DWI. If this is your first DWI charge without aggravating factors, see First-Offense DWI for how that scenario is handled differently under the same statute. And because the criminal case and the administrative license case run on separate tracks, see Driver's License Revocation & MVD Hearings for what happens to your driving privileges while a felony or aggravated charge is pending.
The Three Paths to an Aggravated DWI Charge
New Mexico law recognizes three separate ways a DWI charge becomes aggravated under NMSA § 66-8-102. The first is a blood alcohol content of 0.16 or higher measured within three hours of driving, twice the standard 0.08 threshold. The second is causing bodily injury to another person while driving impaired, regardless of BAC level. The third is refusing chemical testing after arrest when the prosecution has other evidence of intoxication, such as officer observations or field sobriety test results.
Each path carries the same mandatory minimum of 60 consecutive days in jail on conviction, a term that cannot be suspended or deferred by the court. Patrick examines which specific path the prosecution is relying on in every aggravated case, because the evidence required to prove each one is different, and each has different vulnerabilities.
Fourth-Offense DWI and New Mexico's Felony Threshold
A fourth DWI conviction in New Mexico is charged as a fourth-degree felony. The sentence carries up to 18 months in prison, with a mandatory minimum of 6 months that must be served and cannot be suspended, deferred, or reduced through parole in the same way lesser sentences can be. A felony conviction also carries a lifetime ignition interlock requirement, a permanent condition rather than the one-year term that applies to a first offense.
A felony DWI conviction has consequences beyond the sentence itself, including the loss of certain civil rights and a permanent felony record that affects employment, housing, and professional licensing far more severely than a misdemeanor DWI. Patrick treats every fourth-offense case as what it is: a felony prosecution requiring the same level of defense as any other felony charge.
How Prior Convictions Are Counted
Whether a new DWI charge counts as a second, third, or fourth offense depends on how many qualifying prior convictions appear on a person's record, including convictions from other states in many cases. Getting this count right matters enormously, since the difference between a third and fourth offense is the difference between a misdemeanor and a felony charge. Patrick reviews the accuracy of the state's prior-conviction count in every repeat DWI case, since an incorrectly counted prior can mean a client is facing a more serious charge than the law actually supports.
