1.  The crime needs to reported to local police and the Federal Trade Commission.
2.  Then, close any affected bank and credit card accounts.
3. Contact one of the 3 major credit bureaus and freeze your credit.  More information about freezing your credit can be found here.
4. Contact the IRS Identity Protection Specialized Unit at 800-908-4490.  The IRS will provide a PIN that will be required to file tax returns or receive refunds.

More information for victims of Identity Theft can be found here.