Tio-van-du-ah who was often called Chief Snag, was a Shoshoni Chief in what is today known as the Lemhi Valley of Idaho. This area was so named by Mormon missionaries who established Fort Limhi in the area in 1855. Tio-van-du-ah joined The Church of Jesus Christ of Latter-day Saints along with about 100 of his fellow Shoshoni. He does not seem to have participated with Shoo-woo-koo and his Bannock

Bannock

Bannock has more than one meaning:* Bannock , a kind of bread, usually prepared by pan-frying* Bannock , a Native American people of what is now southeastern Oregon and western Idaho* Bannock County, Idaho* Bannock, Ohio...

s in stealing the cattle of the Mormon missionaries. However, the missionaries abandoned their fort due to the mass robbery of their cattle and killing of some missionaries in the process by the Bannocks and some Shoshone who worked with them, leaving Tio-van-du-ah with no connection with the Church.

Tio-van-du-ah was killed by the Montana Vigilantes in Bannock, Montana in 1863.

Sources

• Leonard J. Arrington
  Leonard J. Arrington
  Leonard James Arrington was an author, academic and the founder of the Mormon History Association. He is known as the "Dean of Mormon History" and "the Father of Mormon History" because of his many influential contributions to the field.-Biographical background:Arrington was born in Twin Falls,...
  
  . History of Idaho, vol. 1. (Moscow, Idaho: University of Idaho Press, 1994) p. 172, 179.
• Hank Corless. The Weiser Indians: Shoshoni Peacemakers. (Salt Lake City: University of Utah Press, 1990) p. 28.
• article that mentions Chief Snag's 1863 death