I'm a lawyer, but -- like politics -- all law is local, so I agree with Bountyhunter that you really need to consult someone admitted to the bar in your state. (I can't give legal advice to you unless you're in NY ... and I don't do criminal law, so if I were you I wouldn't rely on my advice anyway!)

Subject to that disclaimer, there might be some misdemeanors listed in your state's penal code that -- depending on what you could actually prove in court -- could fit your situation. (A good site for finding state laws is www.findlaw.com/casecode/index.html#statelaw; click on your state and look for "state code" or "statutes".) But unless you suffered actual and significant physical injury from that other person's actions (as opposed to injuries/damage from the rear-ending), it'll probably be hard for you to get an attorney to take your case against that other person.