This question is mislabeled. It's not a car accident question. This is a criminal law question. Try re-posting so that you can get specialists in that field to respond.
This response is based on limited information. It is not meant as and does not constitute legal advice and does not create an attorney-client relationship.
Retain a local criminal defense attorney. That is your best chance.
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You've listed this under "car accident", however, it sounds like you need to consult with a criminal defense attorney who can review all of the facts and assist you in defending the charges against you. I've changed the practice area to criminal law. Use the Find a Lawyer tab on Avvo to find attorneys in your area to consult with...
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I have changed the practice area to criminal defense for you. Good luck!
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If they read what you wrote here, you will probably not beat it. This is almost a confession. Do not post any more details. Get a criminal defense lawyer.
This is not legal advice. You should always discuss the specifics of your issue in person with an attorney. Be aware that there are time limits on all claims that depend on the kind of claim, so do not delay in seeking an attorney.