Because of high demand for cadavers for anatomical study, several doctors requested the bodies after the execution. The grave was reopened and the bodies were distributed among local doctors, a practice common in the era. The doctor who received the body of Mahpiya Okinajin (He Who Stands in Clouds) was William Worrall Mayo.
Years later Mayo brought the body of Mahpiya Okinajin to Le Sueur, Minnesota, where he dissected it in the presence of medical colleagues. Afterward, he had the skeleton cleaned, dried and varnished. Mayo kept it in an iron kettle in his home office. In the late 20th century, the identifiable remains of Mahpiya Okinajin and other Native Americans were returned by the Mayo Clinic to a Dakota tribe for reburial per the Native American Graves Protection and Repatriation Act.