In 1999, Nobel peace prize winner Rigoberta Menchú brought a case against the military leadership in a Spanish Court. Six officials, among them Efraín Ríos Montt and Óscar Humberto Mejía Victores, were formally charged on 7 July 2006 to appear in the Spanish National Court after Spain's Constitutional Court ruled in 2005 that Spanish courts could exercise universal jurisdiction over war crimes committed during the Guatemalan Civil War.[403] In May 2013, Rios Montt was found guilty of genocide for killing 1,700 indigenous Ixil Mayans during 1982–83 by a Guatemalan court and sentenced to 80 years in prison.[404] However, on 20 May 2013, the Constitutional Court of Guatemala overturned the conviction, voiding all proceedings back to 19 April and ordering that the trial be "reset" to that point, pending a dispute over the recusal of judges.[405][406] Ríos Montt's trial was supposed to resume in January 2015,[407] but it was suspended after a judge was forced to recuse herself.[408] Doctors declared Ríos Montt unfit to stand trial on 8 July 2015, noting that he would be unable to understand the charges brought against him.[409]