Mr. Diaz focuses his practice on federal and state white-collar criminal defense, tax controversies, and complex commercial litigation. He represents individuals, closely held businesses, and corporations in criminal investigations and prosecutions involving tax, healthcare, securities, bank fraud, and other financial crimes. His experience includes matters before the IRS Criminal Investigation Division, the U.S. Department of Justice, United States Attorneys’ Offices, and the Texas Comptroller of Public Accounts, including criminal tax and fraud investigations.
Mr. Diaz also represents individuals, closely held businesses, and corporations in all stages of federal tax controversies, including IRS examinations, administrative appeals, payroll tax disputes, federal tax collection matters, ruling requests, government investigations, and litigation. A significant component of Mr. Diaz’s practice involves advising and representing taxpayers in Employee Retention Credit (ERC) matters, including complex IRS examinations, refund claims, administrative appeals, and ERC refund litigation against the federal government. In addition, he represents clients in complex commercial disputes involving fraud, breach of contract, breach of fiduciary duty, restrictive covenants, business torts, and other business controversies.