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Press Release

Colorado Man Sentenced for Drug Trafficking

For Immediate Release
U.S. Attorney's Office, District of South Dakota

U.S. District Judge Jeffrey L. Viken has sentenced a Denver, Colorado, man convicted of Conspiracy to Distribute a Controlled Substance (heroin). The sentencing took place on July 10, 2023.

Arthur Manning, 56, was sentenced to nine years in federal prison, followed by five years of supervised release, and ordered to pay a $100 special assessment to the Federal Crime Victims Fund.

Manning was indicted for two counts of Conspiracy to Distribute a Controlled Substance (heroin and fentanyl) and Money Laundering by a federal grand jury in December of 2021. He pleaded guilty on March 31, 2023.

Between October of 2020 and October of 2021, Manning supplied heroin, methamphetamine, and fentanyl to people located in South Dakota. He knew that people in South Dakota were going to further distribute the substances. Overall, Manning was responsible for distributing approximately two pounds of methamphetamine, 1,000 grams of fentanyl, and three pounds of heroin. Manning received payment in cash and through online money transfer services. 

This case was investigated by Unified Narcotics Enforcement Team (UNET) and the Drug Enforcement Agency. UNET is comprised of law enforcement from the Pennington County Sheriff’s Office, Rapid City Police Department, South Dakota Division of Criminal Investigation, South Dakota Highway Patrol, and the South Dakota National Guard. Assistant U.S. Attorney Kathryn N. Rich prosecuted the case.

Manning was immediately remanded to the custody of the U.S. Marshals Service.

Updated July 13, 2023

Drug Trafficking