During the Civil War enlisted in the Forty-sixth Regiment, Ohio Volunteer Infantry, at the age of twelve.
Mustered out for temporary disability and reenlisted in 1862 in the One Hundred and Twenty-first Regiment, Ohio Volunteer Infantry, and served until the close of the war.
He was admitted to the bar in 1875 and practiced his profession in Paulding until 1891, when he engaged in agricultural pursuits.
De Witt was elected prosecuting attorney of Arenac County, Michigan, in 1926.
This article incorporates public domain material from the Biographical Directory of the United States Congress