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Press Release

Sioux City Man Back to Federal Prison for Second Time for Violations of Supervised Release Conditions

For Immediate Release
U.S. Attorney's Office, Northern District of Iowa

A man who violated the terms of his supervised release after imprisonment, was sentenced September 28, 2022, to more than 2 years in federal prison.

William Sun, 59, from Sioux City, Iowa, received the prison term after a hearing was held regarding his violations.

Evidence at the revocation hearing showed Sun had failed to report to U.S. Probation within 72 hours, traveled outside the jurisdiction without prior approval, failed to comply with substance abuse treatment, and failed to follow U.S. Probation instructions.  Sun was previously sentenced to federal prison in 2013, to 120 months’ imprisonment for conspiracy to distribute methamphetamine, distribution of methamphetamine within 1000 feet of a protected location, and distribution of methamphetamine.  Sun also had his first term of supervised release revoked in July of 2021, for similar violations, was sentenced to 11 months in federal prison and was only released shortly before his most recent violations and revocation.

Sun was sentenced in Sioux City by United States District Court Chief Judge Leonard T. Strand.  Sun was sentenced to 27 months’ imprisonment.  There is no parole in the federal system.  Sun is being held in the United States Marshal’s custody until he can be transported to a federal prison.

The case was prosecuted by Assistant United States Attorney Shawn S. Wehde and investigated by the U.S. Probation Office. 

Court file information at

The case file number is 12-4061.  Follow us on Twitter @USAO_NDIA.

Updated September 29, 2022

Drug Trafficking