LINKS:

"The Life and Trial of Frank James"
http://www.civilwarstlouis.com/history/jamesgangfrankjamestrial.htm

"Trial of the Century!: The Acquittal of Frank James" Missouri Historical Review, Vol. 92, Issue 2, Jan. 1997
http://statehistoricalsocietyofmissouri.org/cdm/ref/collection/mhr/id/48402

State Historical Society of Missouri
http://shs.umsystem.edu/historicmissourians/name/j/jamesf/index.html

Frank and Jesse James Court Documents from Daviess County
http://www.sos.mo.gov/archives/mdh_splash/default.asp?coll=james

Frank James (Wikipedia)
http://en.wikipedia.org/wiki/Frank_James

Frank James (Historynet)
http://www.historynet.com/frank-james

http://www.history.com/this-day-in-history/trial-of-frank-james-begins-in-missouri
http://www.pbs.org/wgbh/americanexperience/features/biography/james-frank/
http://www.nytimes.com/2013/09/22/books/review/the-lost-cause-and-shot-all-to-hell.html?_r=0

Books:

 Muehlberger, James P., The Lost Cause: The Trials of Frank and Jesse James (Westholme Publishing, 2013)

  Petrone, Gerard, Judgment at Gallatin: The Trial of Frank James (Texas Tech University Press, 1998).