Doing some research into his suspension, sounds like it was something academic related. Direct quote from one of his coaches was "It was a violation of team rules, you really can't get into more than that other than I wouldn't have done it unless, one, it was the right thing to do, and two, it can be a learning experience for Nana."
What I get from this is that he was potentially involved in some form of academic integrity violation. Not the end of his career but definitely something that should, and is, being addressed