During the Civil War Croxton served on the staff of General George E. Pickett.

After his failure to be reelected, he resumed the practice of law and engaged in agricultural pursuits.

In 1892, Croxton was elected judge of Essex County, Virginia, and served from 1892 until his resignation in 1901.

He died in Tappahannock, Virginia, July 3, 1903 and was interred in St. John's Episcopal Churchyard.

There are papers relating to his law practice at the Special Collections Research Center at the College of William and Mary.