My son, who has been residing with his girlfriend in a house owned by me, was charged with domestic abuse this weekend.

According to the charges, he is not allowed to have a third party initiate contact with her regarding the case. I want to contact her as the property owner and ask her to drop the charges. If she does so, I am willing to let her live there for 30 days so that her daughter can finish up the school year. Can I do this or should I hire a lawyer to represent me? Are there any other options or actions available to me?