Jay Y. Lee, who heads South Korea's massive Samsung Group, was given a $5 box meal for lunch and did not sleep in more than 22 hours of questioning in a corruption scandal involving impeached President Park Geun-hye.

Lee, 48, who has a net worth of $6.2 billion and is the third-generation leader of the country's biggest conglomerate, or chaebol, left the special prosecutors' office in Seoul on Friday morning in what appeared to be the same suit and tie he'd worn when he entered a day earlier.

The tall, bespectacled Lee did not look visibly affected by the session, in which he was questioned by two prosecutors, including one nicknamed the "Chaebol Sniper".