Source: US FBI
RAPID CITY – United States Attorney Alison J. Ramsdell announced today that District Court Judge Karen E. Schreier has sentenced a man from Chihuahua, Mexico, for Conspiracy to Distribute a Controlled Substance. The sentencing took place on July 11, 2025.
Ubaldo Balderrama-Marquez, 59, was sentenced to three years and one month in federal prison, followed by three years of supervised release, and ordered to pay a $100 special assessment to the Federal Crime Victims Fund.
Balderrama-Marquez was indicted for Conspiracy to Distribute a Controlled Substance by a federal grand jury in November 2006. He pleaded guilty on April 11, 2025.
The conviction arose from a conspiracy to distribute cocaine operating out of Denver, Colorado. Balderrama-Marquez, along with his brothers Jose Balderrama-Marquez, Miguel Balderrama-Marquez, and Rafael Balderrama-Marquez, sold large quantities of cocaine and marijuana to Ken Walking Eagle, John Ladeaux, and others for further distribution in South Dakota and in the Pine Ridge Indian Reservation.
This case was investigated by the Badlands Safe Trails Task Force, which is comprised of agents with the Federal Bureau of Investigation, Bureau of Indian Affairs, and officers with the Oglala Sioux Tribe Department of Public Safety and the South Dakota Division of Criminal Investigation. Assistant U.S. Attorney Edward C. Tarbay prosecuted the case.
Balderrama-Marquez was immediately remanded to the custody of the U.S. Marshals Service.