The Cook County, Illinois Medical Examiner's office has determined rapper Juice WRLD died from an apparent overdose of codeine and oxycodone. TMZ reports that toxic levels of both drugs were found in the rapper's system. The 21-year-old died shortly after a December drug bust at Chicago's Midway Airport. Witnesses say WRLD took a bunch of Percocet pills--which contain oxycodone--to hide them from authorities. He soon suffered seizures and finally passed away. His mother mentioned that her son had problems with prescription drugs, and he mentioned several times that he drank lean, also known as purple drank, a street drink which contains codeine cough syrup. Marijuana was also found in vacuum-sealed bags in his personal luggage--70 pounds of it, in fact.