yo i'll let you know lil trick, since i worked in admissions office, well first thing your brother needs to do is lot of kiss ass to professors and to the dean of the school. Because if professors write the dean a letter saying that he is a hard working and smart student but he seems distracted the dean will definitely give him another chance. and Dean is the only one who can over turn everything. So basically come up with some BS to your professors saying how you owe money to people back home and you need to work in minimum wage for lot of hours and don't have no time to study and shit, and you do not want to get deported, hopefully seeing that your professors will write a letter to the dean and he gives him a second chance, meaning they'll give you another semester in the school, where your progress will determine your stay. And when he gets the second chance please tell your brother to bust his ass, or he is going to be looking like a dumb ass, if i have  job where i work 40 hours in a desk and still can maintain 3.0 gpa i don't see why he shouldn't. Alright good luck