Who Killed The "Minnesota Iceman"?

In 1968, A Hunter By The Name Of Frank Hausen Shot And Killed A Bipedal Creature In The Woods Of Minnesota. The Creature Was Shot Off A Cliff And Fell Down Into The Icy River Below. Hausen Returned The Next Day To Find The Corpse Entangled In Shallow Icy Water, But Frozen. He Retrieved The Creature And Froze It, And Started Displaying The Corpse At Carnivals For 0.25 Cents A Person.