Unless you were related to the coworker, this I neither family law, nor domestic violence. It is either a civil or criminal matter. Please consult an attorney in your local area. Many attorneys, like myself, give a free initial consult and can give you clearer guidance based on all the specific facts of your case. You should have representation.
This answer is general information which does not establish any attorney-client relationship between the person asking a question and the person answering, or a duty to respond to ongoing questions; nor is it intended to replace competent legal assistance in the jurisdiction where the matter/issue arises or is before a Court.