Prosecutors have asked for South Korea's former president Yoon Suk Yeol to be handed a death sentence if he is found guilty over his botched attempt to impose martial law. A court in Seoul heard closing arguments in Yoon's trial, in which he was accused of being the "ringleader of an insurrection". The charge stems from Yoon's attempt in December 2024 to impose military rule in South Korea - an act that lasted just hours but plunged the country into political turmoil. He was later impeached by parliament and detained to face trial.