The emptied piece of luggage was unusually heavy.
Wilson Miguel Jaquez Torres, 23, arrived at Philadelphia International Airport on Sunday afternoon on a flight from the Dominican Republic.
Torres, of Philadelphia, approached a customs officer with a sports duffel bag in hand. The officer got a "tingling feeling," said Steve Sapp, spokesman for Customs and Border Patrol Protection. Something didn't seem right with Torres or his baggage. So the officer referred him for a second inspection.
"With nothing in it, it was still unusually heavy," Sapp said. "So he stabbed a knife into the bottom of the bag. The blade came back covered with a white powdery substance."