Sharia in Nigeria
In Nigeria, Sharia has been instituted as a main body of civil and criminal law in twelve Muslim-majority states since 1999, when then-Zamfara State governor Ahmad Sani Yerima began the push for the institution of Sharia at the state level of government.
As of 2012, the following 12 states have instituted Sharia:
- Zamfara State (27 January 2000)
- Kano State (21 June 2000)
- Sokoto State
- Katsina State
- Bauchi State (June 2001)
- Borno State
- Jigawa State
- Kebbi State
- Yobe State
- Kaduna State
- Niger State (4 May 2000)
- Gombe State
Blasphemy is a criminal offence in both the Nigerian civil law and shari'a law
In 2002, the first execution of a man convicted under Sharia laws took place in Katsina State. The man was hanged after pleading guilty to murdering a woman and her two children 
Sharia Court of Appeals
Recognized as a federal court of appeals under the government of Nigeria, the Sharia Court of Appeals is the most controversial of the judicial system. It exists within the Federal Capital Territory of Nigeria and is a part of the Unified Courts System. The Sharia Court of Appeals reviews cases involving Sharia law, particularly in the North and Northeast regions of the country. This has caused controversy because while the Sharia Court of Appeals interprets and reviews cases relating to Islamic law, they must also interpret the common and customary laws of the other regions of Nigeria.
Sharia used to be categorized as a customary law in Nigeria. This position has changed given the judicial pronouncement in the case of Alkamawa V Bello(1998) LPELR-SC.293/1991 Hence, Sharia is now seen as a distinct and universal legal system.
There have been numerous riots over the implementation of Sharia, primarily involving non-Muslim minorities in the states which implemented the system. One such riot led to the death over 100 people in October 2001 in Kano State.
In 2002, negative light was brought to Sharia in northern Nigeria when Amina Lawal, a single mother in Katsina State, was accused of adultery and sentenced to death by stoning by a state Sharia court for conceiving a child out of wedlock; the father was released without conviction for lack of evidence. Lawal's conviction provoked outrage both in southern Nigeria and the West, with many national and international NGOs lobbying the federal government to overturn her conviction. In 2004, the conviction was overturned by the Sharia court of appeal, and Lawal returned to private life.
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