how bad is my brothers case?

More details to this question:hi, my brother has gotten charged with trafficking and conspiracy to a drug organization and they are linking him to being a part of the whole thing. they have a warrant for his arrest saying that they have phone evidence of all being involved with moving the drugs and guns around. But he isn’t even a part of it. he doesn’t know any of the people that are in it that also got arrested because he has made purchases for his own personal use but most likely it was some sort of middle man. what would he be facing if he is found gulty, and would he need a personal lawyer?