Some of the posts on this thread are really defective. I suppose, by definition, you either did something or you didn't. But, let's apply a beyond-pre-school level of analysis here.
You either killed someone or you didn't, right? If you plan it in advance, lay in wait, and then drag out the person's death is is the same as if you catch your wife cheating and, in a fury, shoot her in the head once? As if a burglar is in your house robbing you and you plant a bullet in his head? As if you are being mugged and you grab the blade the other person is threatening you with and stab and kill them with it? As if you are driving on a foggy day and you run over a pedestrian?
Cheating could mean he was in a small-group session and copied someone else's essay and submitted it as his own or copied the text from up-to-date and submitted it as his answer or it could mean he planted his back-pack in the bathroom and then referred to his notes during the exam. There are different degrees of academic dishonesty, and I wouldn't just say, "Either he cheated or he didn't" because there is a lot of room for magnitude of the offense.
Also, no one has proposed this yet, but he should probably speak to a lawyer about what his options are, and how to best resist this, especially if they plan on dismissing him and there isn't exactly a lot to lose.