David C. Plymell (49) of Dayton, WY was in the process of attempting to negotiate a sharp curve in the roadway when he lost control of his motorcycle crossing over the center line into the opposite lane of travel. The motorcycle went down on its side at which time Plymell was totally ejected from it. William J. Spooner (46) of Missoula, MT braked and steered in an attempt to avoid Plymell and his motorcycle, however was unable to avoid running over Plymell.
Troopers investigating this crash believe Plymell's inexperience and a speed too fast for the existing conditions were contributing factors in this crash.
The crash occured at 2:57 p.m. (9/29/13) on US 14 abou 5 miles west of Dayton in Sheridan County.