Southern states of Nigeria have imposed a moratorium on the death penalty since 2004.[76] Rwanda 1998 2007[77] Since some of the perpetrators of the Rwandan genocide fled to countries that refuse to extradite suspects to countries that use capital punishment, the Rwandan parliament voted to abolish capital punishment in 2007. São Tomé and Príncipe *None since independence in 1975 1990 Abolished September 1990 by Constitution Senegal 1967 2004 Seychelles *None since independence in 1976 1993 Abolished June 1993 by Constitution Sierra Leone 1998 n/a Death penalty for treason;[78] murder; aggravated robbery.