We are grateful to you for this statement.
Upon questioning about the accusations, the individual promptly refuted them entirely, alleging that you betrayed him and expressing a desire to address the allegations with you. He even mentioned the possibility of legal action against you. That was the extent of the situation. (I doubt he can provide any plausible explanation based on the information you have disclosed.)
We also underscored that both individuals inherently possess such a right and are at liberty in this context; hence, the resolution lies within the discretion of the involved parties.