Federal court is a different world. Different rules, different procedure, different sentencing regime, and a prosecutor's office with resources no local District Attorney has. Cases arrive already investigated — sometimes for years — by federal agents who have been building the file while the client had no idea it existed. Mr. Nguyen is admitted to practice before the United States District Court for the Southern District of California and defends federal charges including drug trafficking and importation, immigration offenses, firearms offenses, fraud, and conspiracy. The federal sentencing guidelines are advisory, not mandatory. That fact is worth years of a person's life — but only if their lawyer knows how to argue it.