On Monday, 29-year-old Nicholas James Imhoff from Florida plead not guilty to a federal drug charge after he was caught with 78 pounds of meth on a Montana highway, authorities said.

Authorities say it was the largest amount of meth ever seized in a traffic stop in the state.

Imhoff was traveling rental from Las Vegas and the drugs were found under floor storage compartments in garbage bags, according to police. He told a state trooper that he was headed to North Dakota for “work.”

Imhoff headed back to custody after appearing  in federal court in Billings.