I have been there and I am still digging out of it. What your not hearing anywhere is the person who took your ID may be as close as a near relative.
1. Check your credit
2. Call the Social Security Administration and let them know. Have your named flagged with everyone.
3. Banks and stores, anywhere you might have credit, pay off credit cards cut them up DON'T get any more until you clear your name, these places sell your information.
4. Go to as many as you can free search engines look for yourself. Why? Because you might be as lucky as I was, I found myself living in nine places. 3 of thoses places was where a sister in law had been and the last one she was still living there. A quick call to the attorney found she was scamming one of my sons and others as well. She was not the only one with my ID she passed it to her friends too.