**Former South Korean President Yoon Suk-yeol remains in custody at Seoul Detention Center following his February 19, 2026, conviction and life sentence for leading an insurrection tied to the December 2024 martial law declaration.** A Seoul Central District Court ruled he orchestrated the unconstitutional deployment of troops to the National Assembly, with prosecutors having sought the death penalty. Separate proceedings produced additional convictions, including a seven-year term (increased on appeal in April 2026) for resisting arrest and related charges linked to the same events. These outcomes, combined with multiple ongoing trials and the severity of the insurrection ruling under South Korean law, create significant structural barriers to release. Life imprisonment in this context carries no realistic prospect of parole or executive clemency before 2027, and appeals have so far reinforced rather than overturned custody. As of mid-June 2026, no scheduled hearings, procedural developments, or political shifts have altered this trajectory, aligning with trader consensus reflected in the 88.9% probability for “No.”