South Korea's impeached president Yoon Suk Yeol attended the sixth hearing at the Constitutional Court on Thursday, with three witnesses expected to take the stand through the day.<br /><br />Yoon's declaration of martial law plunged the country into a constitutional crisis that also saw the prime minister being impeached.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline<br />