Am I required to report fraudulent activity involving DV dispute?

My boyfriend and I have been together for 6 months. In month 3, his soon to be ex-wife found out and was jealous/angry. While visiting his kids, they had words and an altercation. She called the police reporting domestic violence, stated she was in fear of her life. He was put in jail for the weekend. They kept in contact, violating no contact order. She said she would drop charges and write a letter to court if he followed her requests, including breaking it off with me, changing his phone number, giving her his phone records, and being more available to her wants - or she will make it worse for him and get sole custody. He is in the legal field and cannot have a record or he will lose his job. She stopped cooperating with him and the two agreed to move her to a new apt under someone else's name so she cannot be subpoenaed for perjury or to testify against him.