A British teen was arrested at Miami International Airport after authorities say they found 30 pounds of cocaine stuffed into 24 boxes of cake mix in her suitcase. The teen, who turned 18 three days after she was arrested on Oct. 21, faces charges of trafficking cocaine and importation of a controlled substance, according to the Miami Herald. She was being held in Miami's juvenile detention center but will likely be charged as an adult, prosecutors said. The London teen had arrived in Miami on a flight from Jamaica. Federal customs agents made the discovery after her bags were selected for screening.