Call one of the security companies, they'll put an alarm system in for free if you sign up for 2 years of monitoring. Get some pepper spray. File civil action(s) for each incident of damages and get a restraining order against her. Have her processes served at work every time to keep her employer wondering about her stability. Keep her in court and busy with the local police and maybe she'll get the hint.
Sorry to hear about this!!
Sorry to hear about this!!