 Nevertheless, after Unimed's license to import pseudoephedrine and ephedrine products ended on July 1, 2005, it was alleged that Ye Gon and certain employees of his violated the law by continuing to import four unauthorized containers of pseudoephedrine or ephedrine precursor chemicals into Mexico in late 2005 and 2006.Only 4 of Unimed's 291 imported shipments (from Canada, China, England, Germany, Israel, Hong Kong and the United States) into Mexico have ever been questioned.In July 2007, the U.S. government filed an indictment charging that the importation of these four shipments into Mexico was part of a conspiracy to aid and abet the importation of methamphetamine into the United States.