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Press Release

Manderson Man Sentenced for Misprison of a Felony

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

RAPID CITY - United States Attorney Alison J. Ramsdell announced today that U.S. Circuit Judge Jonathan A. Kobes, sitting in district court in Rapid City, South Dakota, has sentenced a Manderson, South Dakota, man convicted of Misprison of a Felony. The sentencing took place on May 14, 2024.

Ivan White Plume, a/k/a Ivan White Butterfly, 33, was sentenced to time served, one year of supervised release, and ordered to pay a $100 special assessment to the Federal Crime Victims Fund. White Butterfly served a total of one year and 11 months in custody.

White Butterfly was indicted for Accessory After the Fact to Second Degree Murder by a federal grand jury in May of 2022. He pleaded guilty on February 14, 2024.

In February 2022, White Butterfly was questioned by tribal law enforcement officers about the disappearance of a 17-year-old female. Despite knowing that his relative, Tyson White Plume, had confessed to shooting and killing the victim, White Butterfly concealed his knowledge of the minor’s death and the shooter’s confession.

This matter was prosecuted by the U.S. Attorney’s Office because the Major Crimes Act, a federal statute, mandates that certain violent crimes alleged to have occurred in Indian Country be prosecuted in Federal court as opposed to State court.

This case was investigated by the FBI and the Oglala Sioux Tribe Department of Public Safety Criminal Investigations Division. Assistant U.S. Attorney Heather Knox prosecuted the case.

Updated May 23, 2024

Indian Country Law and Justice