nothing will happen, it is routine letter from FBI

I received exact same letter 8 month ago, it is routine computerized letter, nothing will happen if you can't get them done your NC when they received First Lady's letter. You have done what you can try, and over 2 yrs, you should consider file WOM unless your district judge have preference over government. You can follow這裏 to file WOM by yourself, or spend a few thousand to find a lawyer for you