If indeed he was arrested, there would be a record of his arrest. If he is a permanent resident, he needs to be careful as to some crimes could land him in deportation proceeding.
If he does get charged with trafficking money, then he needs to hire a qualified criminal defense and immigration attorney. As ICE will deport him if he is charged. When someone is released on bail, they give the person a return date and time and a location of where to go, then he will find out about the charges. He was fortunate not to be held on a no bond hold.
The information provided in this answer does not create an attorney-client relationship. If you are interested in his legal services, feel free to call Chris at (303) 409-7635 at his law office in the Denver Tech Center. All initial consultations are free of charge.