A Houston-area immigration attorney was snagged in a massive marriage fraud case involving nearly 100 defendants who are facing a total of 206 charges, U.S. Attorney Ryan Patrick of the Southern District of Texas announced Monday.

Trang Le Nguyen, managing partner in Pham & Nguyen Law Group in Houston, is facing charges of obstructing and impeding the due administration of justice, and tampering with a witness, which both could bring maximum sentences of 10 years in prison. She also faces charges of mail fraud and conspiracy to commit mail fraud, which could bring possible 20-year sentences.