Who killed willam Wallace?

Wallace was executed by Edward I. He was condemned as a traitor, and thus given the normal English punishment meted out to traitors: being hanged, drawn, and quartered. However, unlike most traitors, he was dragged through the streets for hours tied to horses' tails. Hanging, drawing and quartering means being hung with an agonizingly slow rope then the executioner rips out the still-beating heart. He was also castrated at the point of death.