st louis dWI lawyers
ignition interlock device
DWI Law
- Overview
- 5 & 10 Year Denials
- BAC Tests
- CDL Penalties
- Challenging a DWI
- DWI Arrest
- DWI Court Process
- DWI Expungement
- DWI Penalties
- Field Sobriety Tests
- How To Avoid a Traffic Stop
- Ignition Interlock
- Ignition Interlock Updated
- Limited Driving Privilege
- Limited Driving Privilege - CDL
- Minor In Possession (MIP)
- Multiple DWI Convictions
- PBT Tests
- Police Observations
- Satop
- SR-22
- Statements to Police
An ignition interlock device is a device attached to the ignition system of a vehicle. The device is designed to prevent the vehicle from starting if the driver has been drinking alcohol. The driver blows into the tube of the interlock device, which then determines the amount of alcohol in the driver’s breath (similar to a BAC Breath Test). If the alcohol concentration is too high, the vehicle will not start.
Missouri Statute 577.600.1 outlines the use of ignition interlock devices and the penalties for not complying with a court order to use an interlock device. Essentially, a first time offense for DWI does not automatically mandate the use of an interlock device. Rather, the court has the discretion to require the use of the device. However, the statute requires the court to order a mandatory use of an ignition interlock device in all second offense for DWI cases.
Failure to comply with a court order use of an ignition interlock device is a Class A Misdemeanor. Class A Misdemeanors punishments include:
- Up to 1 Year in Jail, and/or
- Up to $1,000.00 in Fines
Contact us online or call 314.621.0622 (877.621.0622 Toll Free) for a FREE consultation and learn how the law applies to your specific situation. As former police officers and a former prosecuting attorney, we know potential pitfalls in the investigative process. As criminal defense attorneys, we know how to afford you protection under the law. Our education and experience mak a difference.
The Missouri Criminal Defense Attorneys of Millikan Wright LLC focus serving the needs of the greater St. Louis Metropolitan area. On the Missouri side, our criminal lawyers defend people in St. Louis city, St. Louis county, Jefferson county, Franklin county, St. Charles county, and Lincoln county. On the Illinois side, our attorneys represent people hurt in Madison county, St. Clair county and Monroe county.

