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The first step here is that your husband has a right to defend his job and defend himself against this allegation. This means he really should consider using an attorney to defend himself against her allegations as it does increase his chance of success.
Second, you need to go to the union elected officials above this woman if you have not done so already and if you have done so and they have failed to take action, then your next step is a complaint of unfair labor practices
against her and the union for the harassment against your husband. You would file the unfair labor practices complaint with the Labor
Board for their investigation.
Third, if she is continuing to make false allegations against your husband, your husband needs to file a civil suit against her for defamation and harassment and bring his claims against her to civil court to seek damages from her as well as a restraining order against her to prevent further harassment.
These are your legal options to deal with this type of nightmare in the workplace.
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