Rosenblum Schwartz & Fry
314-499-1424

DWI in MO: When do I need an ignition interlock device?

A conviction for a driving while intoxicated (DWI) offense in Missouri can come with serious criminal penalties. In addition to fees and potential prison time, drivers may also need to install an ignition interlock device on any vehicle they operate in order to drive.

What is an ignition interlock device (IID)? An ignition interlock device is used to keep drivers who have consumed alcohol from driving. Essentially, the driver must provide a breath sample into the IID before the engine of the vehicle will start. The breath sample is tested and if it meets a certain requirement the engine will start. If not, the vehicle will not start. 

These devices are often costly and the cost is generally the responsibility of the driver. Costs can include installation and maintenance of the device.

When are IIDs required in Missouri? Missouri law generally requires anyone that is convicted of a second or subsequent DUI offense to use an IID. In some cases, those who are facing a first time conviction can request an IID to forgo a license suspension.

Can I fight these charges? Yes, it is possible to fight drunk driving charges. Defenses are available. A strong defense requires review of the case on an individual basis. As such, it is wise for those who are facing these charges to seek legal counsel. An experienced DWI criminal defense attorney can review the details of your charges and build a defense crafted to your case. This will better ensure your rights are protected.

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Rosenblum Schwartz & Fry

120 South Central Avenue
Suite 130
Saint Louis, MO 63105

Phone: 314-499-1424
Fax: 314-862-8050
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