INTERNATIONAL NEWS - Lee Jae-yong is facing accusations of bribery linked to a scandal that triggered the impeachment of South Korea's former president.
Prosecutors are asking for a 12-year jail sentence. He denies all charges.
The case has gripped the public amid growing anger against South Korea's biggest companies, known as chaebols.
Why is he on trial?
Mr Lee, also known as Jay Y Lee, has been detained since February on a string of corruption charges including bribery, embezzlement and hiding assets overseas.
He stands accused of giving donations worth 41bn won ($36m; £29m) to non-profit foundations operated by Choi Soon-sil, a friend of South Korea's former President Park Geun-hye, in return for political favours.
