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The answer is yes. Marrying a Brazilian national allows one to gain permanent residence in Brazil. However there is an issue. If you file when in Brazil, the process can take up to 2-3 years if you apply through the Federal Police in Brazil. However if you marry now and file before going to Brazil, the process only takes 3 months or so for the visa via the Brazilian consulate.
In addition, a criminal record will be requested. The good news is that Brazilian authorities look at this on a case by case basis. They generally reject individuals with a history of repeated violence, major felonies, a history of criminality, etc. A single DUI is unlikely to be a cause of rejection.
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