I suggest your husband try to reach the DA in this matter and discuss this from the standpoint of the ex being able to get away with the false complaints. If she is continuing to lie under the oath required to file the charges and is giving a false statement to the police , she can be charged and she needs to be. If the DA will not talk to your husband because they essentially are representing the ex, then he is going to have to get a local attorney to intervene on his behalf, mediate and get those charges filed by the DA.
Best to you and your husband in this matter,
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