If you had an opportunity to press assault charges against your wife several months ago, but chose not to and said that nothing happened, you can still try to file a complaint with your local law enforcement agency.  Essentially, you make an appointment with the agency to report the offense or continue with the charges that you initially considered pursuing.  However, do not confuse your ability to file charges with the potential for success.  If you told the police several months ago that nothing happened, then those statements will be used against you now.  Even though it seems somewhat unfair, this is a constant frustration for prosecutors who handle domestic violence claims where victims frequently refuse to pursue charges by claiming that “nothing happened”.  Once a victim commits themselves to a story, the prosecutor is usually stuck with the first version, absent some compelling reason.  You seem frustrated by your wife’s current gossiping and defamation, rightfully so, but that type of action on her part is not usually considered a compelling reason for a prosecutor to pick a case back up after a victim has chosen to drop charges.  So your first step is to try to see if the law enforcement agency and prosecutor’s office will pick the charges back up again.  If that doesn’t work, you may be left with only civil options, like filing for a divorce and seeking a restraining order as part of the divorce action.  A family law attorney may be able to help you with both issues if they are familiar with the law enforcement agencies in your area.