William Kettley Spence (born William Kettley Kimball, June 9, 1906 – May 30, 1929)[1] was an American racing driver.
Spence was killed in the 1929 Indianapolis 500 after making contact with the inside wall in Turn 2.
In the captured film, Spence's front right tire hits the inside wall, indicating the car has previously spun.
The car then rotates counterclockwise, and the right side appears to hit a rut or indentation in the track, causing the car to flip, landing upside down.
[2] Spence also served as a relief driver in the 1928 Indianapolis 500 for Billy Arnold.