A Doosan heir exposed his brothers' slush fund to win the chairmanship, was cast out of the family, and died by suicide

Doosan Group was run in turn by the sons of its founding family. In July 2005 the eldest brother, honorary chairman Park Yong-kon, named Park Yong-sung as the next group chairman. Park Yong-oh, the former chairman, protested and disclosed illegal practices inside Doosan. Prosecutors found that three brothers had worked together from 1995 to create a 32.5 billion won ($31 million) slush fund by overpaying construction contractors and routing the excess back. Doosan paid a 2 billion won fine. Park Yong-sung stepped down and received a suspended three-year sentence. Park Yong-oh was also convicted and given a suspended sentence. He and his two sons were cut off by the family. In 2009 he was chairman of Sungjee Construction, which had business setbacks, and his son was under investigation for stock manipulation. Police found him hanged in his Seoul apartment. Doosan's share price did not move. The family later restored him to its genealogy and Doosan's leadership passed to the next generation^†.