My mother has started a facebook page for my sisters death she was in an abusive relationship and was murdered we are seeking justice for t...

Question

My mother has started a facebook page for my sisters death she was in an abusive relationship and was murdered we are seeking justice for the man who did this is it against the law for us to post his name on this facebook page http://www.facebook.com/justiceformelissaplatt

Answer

I am very sorry to0 hear about your sister's tragic death,

Has the man been criminally charged? Is the family bringing a wrongful death action against him in civil court? If you publish his name, you are subject to an action by him for defamation. If the family does bring a civil complaint, you are free to discuss the publicly available information such as his name and the events recited in the complaint but until such complaint or criminal complaint is filed, I would refrain from publishing his name.