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Press Release

Sioux Falls Woman Sentenced to 10 Years in Meth Conspiracy

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

SIOUX FALLS - United States Attorney Alison J. Ramsdell announced today that U.S. District Judge Karen E. Schreier has sentenced a Sioux Falls, South Dakota, woman convicted of Conspiracy to Distribute a Controlled Substance. The sentencing took place on March 13, 2023.

Roberta Diane Dempsey, 58, was sentenced to ten years in federal prison, followed by five years of supervised release. She was also ordered to pay a $100 special assessment to the Federal Crime Victims Fund.  

Dempsey was indicted for Conspiracy to Distribute a Controlled Substance by a federal grand jury in December of 2021. She pleaded guilty on November 28, 2022.

During her involvement, Dempsey allowed her co-conspirators to use her home to store and repackage multi-pound quantities of methamphetamine. Additionally, she obtained small quantities of methamphetamine from her co-conspirator to distribute to others. Dempsey was personally involved in the distribution of over 500 grams of methamphetamine.

This case was investigated by the Drug Enforcement Administration, U.S. Postal Inspection Service, IRS Criminal Investigation, Sioux Falls Police Department, Minnehaha County Sheriff’s Office, Moody County Sheriff’s Office, and the South Dakota Highway Patrol. Assistant U.S. Attorney Mark Hodges prosecuted the case.

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

Updated March 20, 2023

Drug Trafficking