Contraband: Seized at the Border

A driver claims he buys used cars over the border to import into the U.S., but an X-ray reveals something suspicious in his spare tire; when a traveler returning from Mexico declares snacks at Customs, a Fish and Wildlife expert is called in.

An officer suspects a car is carrying more than innocent Santeria sprays.

Officers find an 18-wheeler carrying more than a load of takeout containers. A couple raises suspicion after declaring bulldog semen, but the labeling suggests the box may actually contain stallion semen -- a valuable and tightly regulated substace.

During his first day on the job, a rookie officer relies on his training, sending a hesitant driver for further inspection -- and his hunch pays off. When a traveler claims to be visiting his dentist bimonthly in Mexico, officers investigate further.

A traveler is caught with blades for cockfighting, a cartel-run blood sport. Every year, Mexico grows millions of dollars of flowers for the U.S., but cartels are taking advantage of the influx of shipments during major holidays.