Sioux Falls Man Sentenced to 10 Years in Federal Prison for Attempted Enticement of a Minor Using the Internet

SIOUX FALLS - United States Attorney Alison J. Ramsdell announced today that U.S. District Judge Lawrence L. Piersol has sentenced a Sioux Falls, South Dakota, man convicted of Attempted Enticement of a Minor Using the Internet. The sentencing took place on January 6, 2025.

Kalvin Michael Frankus, age 37, was sentenced to 10 years in federal prison, followed by five years of supervised release, and ordered to pay a special assessment to the Federal Crime Victims Fund in the amount of $100. Once released from federal prison, Frankus must register as a sex offender.

Frankus was indicted by a federal grand jury in April 2024. He pleaded guilty on October 16, 2024.

The conviction stemmed from an incident on March 10, 2024, when Frankus attempted to have a sexual encounter with a 15-year-old female, who turned out to be an undercover law enforcement officer posing as the teenager. Frankus drove to the agreed location and was arrested.

This case was brought as part of Project Safe Childhood, a nationwide initiative to combat the growing epidemic of child sexual exploitation and abuse, launched in May 2006 by the Department of Justice. Led by the U.S. Attorneys' Offices and the DOJ's Child Exploitation and Obscenity Section, Project Safe Childhood marshals federal, state, and local resources to locate, apprehend, and prosecute individuals who exploit children, as well as identify and rescue victims. For more information about Project Safe Childhood, please visit https://www.justice.gov/psc.

This case was investigated by the South Dakota Division of Criminal Investigation. Assistant U.S. Attorney Elizabeth A. Ebert-Webb prosecuted the case.

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