William Lawrence Sr Omnibit 8-11-15 
The Dakota War of 1862 ended with the hanging of 38 of the participants who had committed rapes and murders of civilians. It was the largest mass execution in United States history.
Due to the demand for cadavers for anatomical study several of the Indian graves were robbed and their bodies acquired by doctors. One of those lucky medical men was William Worrall Mayo who had the skeleton of Mahpya Akan Nazin cleaned, dried and varnished. He kept it in an iron kettle in his office and used it to give his sons anatomy lessons.
Mayo would go on to found the Mayo Clinc. The clinic eventually acquired Mahpya Akan Nazin bones and kept them until finally returning them for reburial to the Dakota tribe shortly before the turn of the Millennium.