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.

A report by prosecutors said the country's then-prime minister, foreign minister and finance minister all expressed reservations the night of the decision.

Yoon Suk Yeol’s bodyguards thwarted investigators in another tense showdown resulting from his short-lived martial law decree.