Another accused conspirator, Morton Sobell, fled with his family to Mexico City after Greenglass was arrested. They took assumed names and he tried to figure out a way to reach Europe without a passport. Abandoning that effort, he returned to Mexico City. He claimed that he was kidnapped by members of the Mexican secret police and driven to the U.S. border, where he was arrested by U.S. forces. The US government claimed Sobell was arrested by the Mexican police for bank robbery on August 16, 1950, and extradited the next day to the United States in Laredo, Texas. He was charged and tried with the Rosenbergs on one count of conspiracy to commit espionage.