
How to Challenge Prior DUI Convictions in a Montana Felony Case
Understanding the Role of Prior Convictions in a Montana Felony DUI Key Takeaways: In Montana, a DUI becomes a felony on the fourth or subsequent offense, making each prior conviction classification critical to your exposure. Challenging even one defective conviction can reduce charges or change the outcome. The strongest challenges rest on the right to counsel, since any waiver must be made specifically, voluntarily, and knowingly. A defendant can present an affidavit and testimony to shift the burden to the State. Out-of-state and tribal court convictions count through comity but remain subject to validity review, accuracy checks, and statutory exclusions. Credibility, corroborating documentation, and BAC figures attached to priors all








