Sometimes when the police don't agree with your way of looking at things, you can go over their heads directly to the prosecutor's office and report the crime to them. YOu may be able to convince them that this is indeed cyber bullying/aggravated harassment, and if it not in violation of the order that it is a whole new offense, with which the person should be charged.
If the prosecutor agrees with the police, then you're not going to be able to utilize the criminal justice system to resolve the problem. You could go to a local lawyer and hire him to send a cease and desist letter. That's a letter which lays out the recipient's objectionable conduct and tells them that if they don't take the post down and cease from such harassment, you will take legal action against her.
You could do something like this for yourself, but it has more teeth in it when it arrives registered or certified mail on legal stationery. The person will kow that you bothered to consult a lawyer, and most reasonable people getting such a letter will comply with it sooner than be sued.
You don't have to hire the lawyer for more than just to write and mail the letter, so the cost will be very reasonable. If it doesn't work, they you could sue her for the harassment, defamation of character and the invasion of your privacy.
You can also contact Facebook and report the post and ask for it to be taken down.