Riverside CT

My brother got pulled over because he was diving a car that matched the description of a robbery suspect. After making him back out of the car with their guns drawn, go to his knees, etc. They realized he was not the suspect but he had been drinking. They gave him a field test, decided to take him in. He was told at the jail that the breathalyzer was not working so he did a blood test. I do not know the results of the test. He is over 21, has no priors for anything, was not speeding, swerving, Etc. Just in the wrong place at the wrong time, and yes, HE PROBABLY SHOULD NOT HAVE BEEN DRIVING. So my question is, what is he looking at as far as jail, fines, etc. Does he have any viable defense for probable cause? I hope to hear from knowledgeable lawyers, LEO’s, and people with similar situations. I know I will hear from other trolls, and they are always funny to read too, so knock yourself out trolls!
Thanks