Charles Penrose opines that hanging is inadequate a punishment since no blood is shed.
Charles W. Penrose, Blood Atonement as Taught by Leading Elders of the Church of Jesus Christ of Latter-day Saints, transc. John Irvine (Salt Lake City: Deseret News, 1916), 21
The man who commits murder, who imbrues his hands in the blood of innocence, cannot receive eternal life, because he cannot get forgiveness of that sin. What can he do? The only way to atone is to shed his blood. Hanging is not the proper method.