In 1848 , he served as a scout in an American expedition against the Apache and Ute .
Kirker was employed by Col. Alexander William Doniphan 's American army as a scout , and participated in the American invasion of northern Mexico during the Mexican -- American War .
In 1848 , Kirker served as a scout in an American expedition against the Apache and Ute .
Kirker was employed by Col. Alexander William Doniphan 's American army as a scout , and participated in the American invasion of northern Mexico during the Mexican -- American War .