Col. William Marshall
The best known of the Commission members, Marshall participated in only the first twenty-nine cases before being replaced by Major Bradley. Marshall commanded five companies in the final battle at Wood Lake. Prior to joining the Army, he served in both the Wisconsin and Minnesota legislatures and was a founding member of the Republican Party in the Minnesota Territory. Marshall was also among the State's first newspapermen, founding and editing the St. Paul Press. After serving the Union in the Civil War, Marshall returned home a hero and was elected Governor of Minnesota in 1965.
Col. William Crooks
William Crooks commanded the 6th Minnesota Regiment at the battles of Birch Coulee and Wood Lake. He was a West Point graduate. After the 1862 Conflict, Crooks served in the Minnesota State Legislature.
Captain Grant served under Col. Marshall at the Battle of Wood Lake. He commanded a company at the Battle of Birch Coulee, taking full command after his superior officers were wounded in the fighting.
First Lt. Olin
First Lt. Olin was second-in-command of the 3rd Minnesota Regiment at the Battle of Wood Lake. He later served as Assistant Adjutant General for the District of Minnesota.
Captain Hiram Bailey was of the 6th Minnesota Regiment.
Major Bradley replaced William Marshall as a member of the Commission after twenty-nine trials. Bradley fought in the Battle of Wood Lake and with the 7th Regiment that relieved men under siege at Birch Coulee. He was later one of Minnesota's the first lawyers.
Isaac Heard, Commission Recorder
Isaac Heard was, at the time of the trials, a member of Colonel Sibley's staff. Heard was a St. Paul attorney and, for many years, worked as the prosecuting attorney of Ramsey County. In 1864, Heard authored a book entitled History of the Sioux War and Massacres of 1862 and 1863, which is the leading contemporary account of the Dakota Conflict.