The man central to blocking investigators from arresting South Korea's impeached President Yoon Suk Yeol has come under the spotlight himself in the political crisis sparked by Yoon's brief declaration of martial law last month.

The opposition said the impeached president’s letter to his supporters was aimed at triggering an ‘extreme clash’.

The opposition Democratic Party said Yoon was delusional and remains committed to his "insurrection". Read more at straitstimes.com.