Criminal Law Questions? Ask a Criminal Lawyer.
the guy sounds very dangerous. yes, you should consider consulting with a local attorney about this matter. if you are concerned you may be charged criminally with an assault on the child then i suggest a criminal defense attorney
i also think you should explain the comments made on the facebook page as they appear to be borderline defamatory - the thing is you already apologized so he is only posting the facts as he understands them to be - so it is something you would want to discuss
also, if he laid his hands on you with an intent to harm you, you can also file criminal charges against him by filing a police report about the incident.
again, at this time a criminal defense attorney would be your best bet