A deputy with the Camden County Street Crimes Unit stopped a semi who was speeding well over the posted limit Friday.
The deputy was suspicious of the semi driver and asked to search the truck.
During the search, the deputy found 1/2 gram of crack cocaine.
The deputy arrested 52-year-old Marty Ray Cantrell of St. Robert.
Cantrell was charged with possession of a controlled substance, using drug paraphernalia, careless driving, and speeding.
Cantrell is being held in the Camden County Jail on $2,000 cash-only bond.