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Korean Law Demystified!

₩17 Million and a Smartwatch Camera: Soldier Who Sold Military Secrets to China Gets Four Years

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A Korean Army sergeant who leaked classified military materials — including documents related to ROK-US combined exercises — to a Chinese intelligence operative over seven months has had a four-year prison sentence confirmed by the Supreme Court. Here are the key points.

Issue

Can a soldier be convicted of general treason and military secrets disclosure for leaking classified materials to an unidentified foreign national who claimed to represent a Chinese intelligence organization — even without direct proof that the handler was formally affiliated with that organization?

Facts

  • A, a sergeant in the Korean Army, made contact with an unidentified Chinese national through social media and met him in Beijing in August 2024. The man presented himself as connected to a Chinese intelligence organization and proposed that A supply non-public military materials in exchange for payment. A agreed.
  • Between that meeting and February 2025, A leaked classified military materials on seven separate occasions, receiving a total of approximately ₩17.26 million. The leaked materials included documents related to ROK-US combined military exercises, United Nations Command-related materials, and Korean military-only training documents.
  • When A expressed difficulty photographing classified documents with his iPhone, his handler supplied him with a smartwatch equipped with a hidden camera — which A then used to photograph the materials.
  • A was charged with general treason, military secrets disclosure, bribery following improper conduct, and violation of the Act on Promotion of Information and Communications Network Utilization.
  • A separate charge under the Act on the Punishment of Acts of Arranging Sexual Traffic was acquitted — the court found the supporting evidence had been obtained through a search warrant issued for the military secrets investigation and had no objective connection to that investigation, making it inadmissible for the separate offense.

Lower Court Decisions

  • The military court of first instance sentenced A to five years in prison.
  • Seoul High Court reduced the sentence to four years plus a ₩20 million fine and forfeiture of approximately ₩19.07 million, finding the evidence established that A had leaked military secrets to a Chinese intelligence organization through the handler — even though no direct proof existed that the handler held formal organizational membership. The court found the totality of the facts sufficient to establish that military secrets had been transmitted to a Chinese intelligence operation. It noted A had received security training as an active-duty soldier and knew full well that disclosing military secrets was prohibited, and found the premeditated and systematic nature of the conduct to be an aggravating factor.

Supreme Court Decision

  • The Supreme Court (Division 2, presiding Justice Park Yeong-jae) dismissed A’s appeal and confirmed the four-year sentence, finding no legal error in the appellate court’s reasoning.
  • A’s argument that he lacked the intent required for treason was rejected at both appellate levels and not revisited by the Supreme Court.

Key Takeaways

  • Direct proof of a handler’s formal affiliation with a foreign intelligence organization is not required for a treason or military secrets conviction — it is sufficient that the totality of the circumstances establishes that classified information was transmitted to a foreign intelligence operation through that handler.
  • The provision of specialized surveillance equipment — a smartwatch camera — by the handler to facilitate covert photography of classified materials is strong circumstantial evidence of an organized intelligence operation, even where formal organizational membership is not documented.
  • Active-duty soldiers who have received security training are held to a high standard of awareness regarding the prohibition on disclosing military secrets. Prior security education is treated as an aggravating factor, not a neutral background fact.
  • Evidence seized under a search warrant for one offense cannot be used to prosecute a separate, unrelated offense unless there is an objective connection between the two. The sexual services charge failed because the supporting evidence lacked that connection to the authorized warrant scope.
  • Systematic, premeditated conduct — over seven months, using supplied surveillance equipment, across seven separate transactions — is treated as significantly more serious than opportunistic or impulsive disclosure.

Why This Matters

This case is the second confirmed treason conviction involving Chinese intelligence contact to be summarized on this blog in recent months — following the conviction of the two Chinese nationals who photographed Korean and US military installations. Together, these cases illustrate a pattern of foreign intelligence activity targeting the Korean military through multiple vectors: civilian observers and now an insider. For military security practitioners and policymakers, the use of social media as a recruitment channel and consumer electronics as covert surveillance tools underscores the difficulty of detecting insider threats through traditional security protocols. For legal practitioners, the case confirms that the treason framework reaches organized intelligence operations even where the foreign handler’s organizational affiliation cannot be formally documented.

Article: https://www.yna.co.kr/view/AKR20260917197700004?input=1195m

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