A major bust for Border Patrol agents.
40-year-old Francisco Castillo of Juarez was stopped at the Border Patrol checkpoint in El Paso on Wednesday.
That's when officers stumbled upon over half a million dollars of cash hidden in a spare tire.
Agents arrested Castillo and he's now charged with currency smuggling.
This is the largest money seizure made by officers this year.
Agents say every dollar they stop from being taken across the border makes it that much harder for criminal organizations.