Case Concerning Avena and other Mexican Nationals (Mexico v. United States of America) 2004 I.C.J. 1 (Mar 31) 51 Mexican nationals were in jail on various charges, including three prisoners who had been convicted of a capital crime and were on death row. At the time of their arrests the prisoners were not warned that they had a right to contact the Mexican Embassy. Under the Vienna Convention on Consular Rights 36(1)(b), foreign nationals have a right to contact their embassy when arrested. The US was a party to the Convention. Mexico went to the International Court of Justice (ICJ) who ordered the US to "take all measures necessary" to prevent the execution. The ICJ found that the US was in breech of their treaty obligations. The ICJ found that in order to 'make it good', the US would have to review the sentences of the Mexican nationals. Mexico had pushed to have the sentences annulled, but the ICJ didn't feel that was required.