Source: Office of United States Attorneys
Monroe Thompson, age 40, from Mason City, was sentenced February 7, 2025, to more than 20 years in federal prison after an August 28, 2024, guilty plea to conspiracy to distribute a controlled substance.
Evidence in the case revealed that between May 2023, and August 2023, Thompson was part of an ongoing drug conspiracy based in Mason City, Iowa to distribute methamphetamine and fentanyl. Thompson purchased methamphetamine from sources working with law enforcement. During the execution of a search warrant at Thompson’s residence, officers located counterfeit M-30 pills containing fentanyl.
Thompson has an extensive criminal history including several convictions for possession of controlled substances, possession of a firearm by a felon, and assault – inflicting serious injury in Iowa; Absence from custody in Minnesota; possession of controlled substances and/or selling or manufacturing controlled substances, and possession of firearms in Illinois; as well as Burglary, taking a vehicle without the owner’s consent, disorderly conduct and resisting or obstructing, and possession with intent to distribute controlled substances in Wisconsin.
Thompson was sentenced in Sioux City by United States District Court Judge Leonard T. Strand to 262 months’ imprisonment. He must also serve a 5-year term of supervised release after the prison term. There is no parole in the federal system.
Thompson is being held in the United States Marshal’s custody until he can be transported to a federal prison.
The case was investigated by the Cerro Gordo County Sheriff’s Department and the Iowa Division of Narcotics Enforcement, and was prosecuted by Assistant United States Attorney Ron Timmons.
Court file information at https://ecf.iand.uscourts.gov/cgi-bin/login.pl.
The case file number is 24-3014.
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