The verdict marks the latest legal blow for South Korea's impeached former leader Yoon Suk Yeol, who has already been sentenced to life in prison earlier this year.

Ex-South Korean President Suk Yeol Sentenced To Additional 30 Years In Prison Over Drone Incursion

SEOUL -- South Korea's former president Yoon Suk-yeol was sentenced to 30 years in prison for general treason linked to the infiltration of drones into the Democratic People's…