Pinochet's 17-year rule was given a legal framework through a controversial 1980 plebiscite, which approved a new constitution drafted by a government-appointed commission. In a 1988 plebiscite, 56% voted against Pinochet's continuing as president, which led to democratic elections for the presidency and Congress. After stepping down in 1990, Pinochet continued to serve as Commander-in-Chief of the Chilean Army until 10 March 1998, when he retired and became a senator-for-life in accordance with his 1980 Constitution. However, Pinochet was arrested under an international arrest warrant on a visit to London on 10 October 1998 in connection with numerous human rights violations. Following a legal battle, he was released on grounds of ill-health and returned to Chile on 3 March 2000. In 2004, Chilean Judge Juan Guzmán Tapia ruled that Pinochet was medically fit to stand trial and placed him under house arrest. By the time of his death on 10 December 2006, about 300 criminal charges were still pending against him in Chile for numerous human rights violations during his 17-year rule, as well as tax evasion and embezzlement during and after his rule. He was also accused of having corruptly amassed at least US$28 million.