On the 27th, the special prosecutor's team for the insurrection case, led by Cho Eun-seok, declared their appeal against the first decision that handed down a life sentence to former President Yoon Suk-yeol for insurrection. They stated that the emergency martial law declared on December 3 was not an accidental measure but rather a meticulously prepared action aimed at monopolizing and maintaining power, lacking a set restoration timeline. The team provided specific reasons for their appeal, contesting the judgments made during the initial trial regarding the preparation and purpose behind the emergency martial law declaration as well as the conditions under which insurrection charges could be established.

The special prosecutor's team claims that the trial court's assertion that Yoon decided to declare martial law on December 1, 2024, is an incorrect fact. They presented evidence, including notes from former head of the Intelligence Command, Noh Sang-won, and meetings with military commanders, arguing that preparations and conspiracy for martial law began at least a year prior. They contested the court's dismissal of their claims regarding the timing and relevance of these notes, indicating that they demonstrate a timeline of preparation that was not duly considered in the ruling.

Additionally, the special prosecutor's team asserted that, based on testimonies from military commanders and the surrounding circumstances, the decision to implement martial law was made as early as November 9, 2024, during a meeting between Yoon and key military figures in a critical role for martial law execution. They further argued that the court overlooked significant evidence concerning national legislative motions demanding the lifting of martial law, thus challenging the legitimacy of the declarations made by Yoon and emphasizing the seriousness of their appeal against perceived judicial errors in the initial ruling.