Recommended reading - Missouri Legend, by E.B. Ginty (1938):

Missouri Legend

A Comedy in Three Acts
Play by E.B. Ginty (1938)
ASIN: B00085V4NE
Published by Random House.
Published 1938.
First Edition.

Description:

Inspired by the true Jesse James story.
Filmed as The Man from Texas (1948), directed by Leigh Jason.