If you're accused of helping another student, say, either through a charge involving collaboration or providing unauthorized assistance, if you did not do as such, the hope would be that the other student has no evidence to prove as such, other than his or her word in that regard. There certainly should not be any emails or text messages that would implicate you as the accused student. That being said, you cannot depend on the school, or the hearing panel, whoever may be the decision-maker, the conduct office, for example, to be receptive to that alone.
It often would require a dedicated effort to get the school to be understanding of the fact that an accused student was, in fact, not culpable or responsible for any kind of academic misconduct. Having an experienced attorney advisor will be your best ally to help you understand and navigate the process and to take the most appropriate steps forward. They should be involved as early as possible in an academic misconduct case.