My brother has 2 previous dui charges in California and just received his 3rd Dui in Colorado. So that's 5 DUIs. What kind of sentence could he be fac

A DUI that is a fourth or more offense is a class 4 felony in Colorado. A class 4 felony carries a potential sentence to prison of up to 6 years in prison followed by three years of parole.  The actual sentence he will get depends on MANY factors like the county the case is in, the judge, the DA, the facts of his case, etc.  BUT often people get probation with some county jail time, sometimes a felony conviction can be avoided.  But he certainly needs a lawyer to help him with the case.