His younger brother Edward T. Miller also joined the gang and was allegedly killed by Jesse James in 1881.

[2] At the age of 14, Clell Miller joined Bloody Bill Anderson's guerrillas during the American Civil War.

[2] The following James gang events were allegedly attributed to Miller:[1] On September 7, 1876, Miller was shot and killed by townspeople in the robbery attempt on the First National Bank of Northfield, along with outlaw Bill Chadwell and bank cashier Joseph Lee Heywood and citizen Nicholas Gustavson.

Both of the bodies of Clell Miller and Bill Chadwell were exhumed the following night and were put into wooden barrels.

The 22-year-old medical student, Henry M. Wheeler, used them as cadavers and displayed the skeleton of Clell Miller in his office in Grand Forks, North Dakota until his death.