A second DWI in Missouri

Missouri does not count offenses, it classifies people. A second DWI makes you a "prior offender" — one intoxication-related traffic offense within five years — and that moves the charge from a class B to a class A misdemeanor. The grade matters less than what comes with it: a prior offender may not be given a suspended imposition of sentence and may not pay a fine instead of serving time, and cannot be paroled or placed on probation until ten days are actually served. There is one way around the ten days, and it is written into the statute: thirty days of court-supervised community service instead. That is the whole substance of a second Missouri DWI — the ceiling barely moves, the floor appears.

Start from what the statute forces and what it leaves to the judge. The floor here is up to one year, and at least ten days served before parole or probation. Everything above that floor is argued, and the same conviction can end up served in custody, on work release or as a condition of probation depending on the county and the judge. What no one can promise you is a sentence below the statutory minimum — that is not a question of persuasion.

Class A misdemeanor: up to one year, and at least ten days served before parole or probation, and a fine of up to $2,000. The range is set by Mo. Rev. Stat. § 577.010.2(2)(a), .3; § 577.001(20); § 558.011; § 558.002, and the figures on this page come from the statute rather than from a summary of it.

Missouri offers the interlock as a trade: fit the device and you drive immediately on a 90-day restricted privilege, or skip it and sit out a 30-day hard suspension first. The catch is the exit — your installer must certify you finished violation-free before the device comes off, and without that certificate you serve another 30 days. The device requirement and the criminal penalty are separate tracks: one is handled by the court, the other by Missouri Department of Revenue, Driver License Bureau.