Samsung Electronics Vice Chairman Jay Y Lee, convicted of bribery and embezzlement, has been released on parole.
But he has two other trials to face - one in which he is accused of accounting fraud and stock price manipulation and another in which he is accused of unlawfully using a sedative.
The following is a timeline of Lee's legal woes.
Oct 24: Allegations of wrongdoing by former President Park Geun-Hye involving a personal confidant, Choi Seo-won, better known by her former name Choi Soon-Sil, is reported by a local cable channel.
Nov 13: South Korean prosecutors question Jay Y Lee in a probe over the growing political scandal involving Park.
Dec 21: A team led by a special prosecutor launches a formal criminal investigation.
Feb 17: Lee is arrested, accused of paying bribes to organisations controlled by Choi to secure support for a merger of two Samsung affiliates that was widely seen as designed to cement his control of the Samsung conglomerate.
Feb 28: Samsung Group dismantles its corporate strategy office amid accusations that Lee worked with the office to bribe Park via Choi.
Feb 28: South Korean prosecutors indict 17 people including Lee over the scandal.
Aug 25: The Seoul Central District Court sentences Lee to five years in prison for bribery, hiding assets abroad and embezzlement.
Feb 5: Lee is released from jail after an appeals court cut his sentence to two and a half years and suspended the sentence for four years. Lee's attorney says he will appeal to the Supreme Court to try to overturn the conviction.
Aug 29: South Korea's Supreme Court sends Lee's case back to the appellate Seoul High Court for review, saying its interpretation of what constituted bribes was too narrow.
Jan 9: Samsung Group sets up an anti-corruption panel headed by a former supreme court judge to improve compliance and prevent violation of governance rules.
May 6: Lee makes a public apology over controversies in succession plans at Samsung and says he will not hand over management rights to his children.
Sept. 1: Prosecutors indict Lee and 10 others, accusing them of accounting fraud and stock price manipulation in connection with a 2015 $8 billion merger of two Samsung affiliates.
Jan 18: The Seoul High Court sentences Lee to two and a half years and he returns to prison.
March 19: Lee receives emergency surgery for a burst appendix and is hospitalised until April 15 when he returns to prison.
March 26: A South Korean independent panel recommends prosecutors stop probing Lee over an allegation of unlawful use of a sedative.
April 22: Trial in which he is accused of accounting fraud and stock price manipulation begins.
June 4: Prosecutors seek a 50 million won ($43,670) fine for Lee over the alleged unlawful use of the sedative.
June 29: A court orders Lee to stand trial for the sedative use.
Aug 9: Parole for Lee is approved.
Aug 13: Lee is released from Seoul Detention Center on parole.
Sept 7: Trial over his sedative use is scheduled to begin.