Montgomery County, Texas: October 21, 2009 On Wednesday, the Montgomery County Sheriff’s Office Special Investigations Unit (SIU) uncovered approximately 3,300 pounds of marijuana inside of an 18-wheeler parked at the Flying J Truck Stop on SH 242. The truck, which was left parked in the common area of the business, had expired registration and inspection certificates. A narcotics dog led to the discovery and seizure of the marijuana, which was hidden under fruit and vegetable boxes in the trailer. No arrests have been made and the investigation is ongoing.