Federal Felon Who Sold Fentanyl and Heroin Causing Two Marion Overdose Deaths Sentenced to Federal Prison

A convicted federal felon who sold fentanyl and heroin that resulted in two overdose deaths in 2023 was sentenced on March 3, 2026, to a total of 37 years in federal prison.

Cody Kinzie Dittmar, age 34, originally from Dubuque, Iowa, received the prison term after a June 25, 2025, jury verdict finding him guilty of distributing and conspiring to distribute heroin and fentanyl, resulting in two deaths.

Court records show that Dittmar was sentenced to 64 months in federal prison for a 2017 conviction for being a felon in possession of a firearm. The evidence at trial showed that Dittmar was released to federal supervised release in June 2023. Dittmar immediately began selling heroin and fentanyl with his girlfriend, then wife, Alysha (Gould) Dittmar. On July 1, 2023, the Dittmars sold a mixture of heroin, fentanyl, and xylazine to a customer in Marion, Iowa. The customer and his wife used the drugs shortly thereafter. Both then died of overdoses. The Dittmars continued to sell heroin and fentanyl in the Cedar Rapids area until July 2024. Alysha Dittmar previously pled guilty to distribution of heroin and fentanyl resulting in the two deaths.

Dittmar was sentenced in Cedar Rapids by United States District Court Chief Judge C.J. Williams. Dittmar was sentenced to 420 months' imprisonment. He must also serve a three-year term of supervised release after the prison term. Dittmar was serving a term of supervised release on his 2017 case at the time he committed the crimes that led to his convictions in 2025. The court also sentenced Dittmar to two years' consecutive imprisonment as a result of the revocation of his supervised release. There is no parole in the federal system.

Dittmar 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 Marion Police Department and the Drug Enforcement Administration (DEA) Task Force consisting of the DEA; the Linn County Sheriff's Office; the Cedar Rapids Police Department; the Marion Police Department; and the Iowa Division of Narcotics Enforcement and was prosecuted by Assistant United States Attorneys Nicole Nagin and Dan Chatham.

Court file information at https://ecf.iand.uscourts.gov/cgi-bin/login.plLinks to other government and non-government sites will typically appear with the "external link" icon to indicate that you are leaving the Department of Justice website when you click the link..

The case file number is 25-CR-00001-CJW-MAR.

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