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Press Release

Sioux City Man to Federal Prison for Meth and Gun Convictions

For Immediate Release
U.S. Attorney's Office, Northern District of Iowa
Shot at drug customer’s home, and fortified his own residence to protect his drugs and guns

A man who conspired to distribute methamphetamine and possessed guns was sentenced June 28, 2019, to 19 years in federal prison.

Travis Wayne Mattson, age 35, from Sioux City, Iowa, received the prison term after a November 26, 2018, guilty plea to conspiracy to distribute methamphetamine and possession of a firearm in furtherance of a drug trafficking crime.

At the guilty plea, Mattson admitted his involvement in a conspiracy that from January, 2017, through approximately May 11, 2018, distributed nearly 10 pounds of methamphetamine mixture in the Sioux City, Iowa area.  Mattson kept his methamphetamine and drug proceeds in safes inside his home.  Evidence also showed that on one occasion Mattson fired multiple rounds at a drug customer’s residence.  During a search warrant of Mattson’s residence, law enforcement located methamphetamine, drug paraphernalia, a digital scale, 9mm rounds of ammunition, a bullet proof vest, and two guns.  Evidence at the sentencing further showed that Mattson installed metal and wood barricades to fortify his residence as well as security cameras to monitor entrances to the residence. 

Mattson was sentenced in Sioux City by United States District Court Chief Judge Leonard T. Strand.  Mattson was sentenced to 228 months’ imprisonment.  He must also serve a 4-year term of supervised release after the prison term.  There is no parole in the federal system.  Mattson 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 Mikala Steenholdt and investigated by the Iowa Division of Narcotics Enforcement, Iowa Department of Criminalistics Investigation, Spencer Police Department, Clay County Sheriff’s Office, Iowa Great Lakes Drug Task Force, and Bureau of Alcohol, Tobacco, Firearms, and Explosives. 

Court file information at

The case file number is 18-4043.  Follow us on Twitter @USAO_NDIA.

Updated July 2, 2019

Drug Trafficking
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