Dean Brown returned to politics in 1992. The Labor government of John Bannon was embarrassed by the losses of the State Bank of South Australia, but the existing Liberal leader (Dale Baker) was failing to capitalise. The moderate and conservative wings of the Liberal party each convinced a sitting member to give up his safe seat (Ted Chapman giving up Finniss for Brown, Roger Goldsworthy giving up Kavel for Olsen), allowing both Brown and Olsen to re-enter parliament at by-elections on the same day, and contest the Liberal leadership. In the ensuing ballot, Brown narrowly defeated Olsen.
Brown then led the Liberal party to a landslide electoral win at the 1993 South Australian election, becoming premier. But in 1996, Olsen successfully challenged for the leadership.
After Olsen resigned as premier in 2001, Brown became deputy leader to Rob Kerin. In 2005 he announced that he would leave politics at the 2006 election, and resigned the deputy leadership.
In October 2007, Brown was appointed special drought adviser to South Australian Premier Mike Rann.
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