Starting in 1642 within British America, an estimated 365[74] juvenile offenders were executed by the states and federal government of the United States.[75] The United States Supreme Court abolished capital punishment for offenders under the age of 16 in Thompson v. Oklahoma (1988), and for all juveniles in Roper v. Simmons (2005). In addition, in 2002, the United States Supreme Court declared unconstitutional the execution of individuals with mental retardation, in Atkins v. Virginia.[76]
Between 2005 and May 2008, Iran, Pakistan, Saudi Arabia, Sudan and Yemen were reported to have executed child offenders, the most being from Iran.[77]
The United Nations Convention on the Rights of the Child, which forbids capital punishment for juveniles under article 37(a), has been signed by all countries and ratified, except for Somalia and the United States (notwithstanding the latter's Supreme Court decisions abolishing the practice).[78] The UN Sub-Commission on the Promotion and Protection of Human Rights maintains that the death penalty for juveniles has become contrary to a jus cogens of customary