Well you'll need to hire an attorney to deal with the criminal case obviously. You'll dave to post a bond up lift the warrant. You can make an identity theft claim through the DAs office and the local sheriffs department. Its tricky because they are going to assume your guilty. So you may have to clean the criminal case up first before they'll listen to you. Your attorney will be able to help you with the process.
Macy Jaggers's answer to a legal question on Avvo does not establish an attorney-client relationship. Please consult an attorney who practices criminal law in your jurisdiction for the most accurate legal advice.
The warrant will require you to deal with the criminal case first and foremost. Once you are dealing with that you can look into ID theft. Be careful in doing so, filing false claims of ID. Theft is a state and federal crime.