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Counter Proliferation Investigation Unit

Man sentenced for illegally exporting rocket technology to South Korea

MIAMI - Juwhan Yun, a/k/a Jw Yun was sentenced today in federal court to 57 months in prison to be followed by three years of supervised release for illegally importing rocket technology to South Korea, following an investigation by the U.S. Immigration and Customs Enforcement (ICE) Office of Homeland Security Investigations (HSI) in Ft. Lauderdale, the Defense Criminal Investigative Service, and NASA Office of Inspector General's Office of Criminal Investigations.

Yun had pled guilty on May 14 to knowingly and willfully engaging in the business of illegally brokering for the purchase and sale of defense articles to the Republic of Korea, without first having registered and obtained a license from the U.S. Department of State Directorate of Defense Trade Controls (DDTC), in violation of the Arms Export Control Act (AECA), 22 United States Code, Section 2778, and the International Trafficking in Arms Regulations (ITAR), 22 Code of Federal Regulations, Parts 120-130.

Among the items he brokered were components for a 20mm gun known as the M61Vulcan, Russian Air Defense Systems and their parts and components, SU-27 Russian Fighter Aircraft and their parts and components, and RD-180 Propulsion Systems and related technology.

According to court records, Yun was previously convicted of a conspiracy to export Sarin gas and was sentenced to 39 months in prison. As a result of this previous conviction, Yun was debarred by the Department of State, and was prohibited from engaging in any export or brokering activities involving defense articles.

The case was prosecuted by Assistant U.S. Attorney Michael Walleisa.