John Wesley Hardin! His name spread terror in much of Texas in the years following the Civil War as the most wanted fugitive, with a $4,000 reward on his head. A Texas Ranger wrote that he killed men just to see them kick. Hardin began his killing career in the late 1860s and remained a wanted man until his capture in 1877 by Texas Rangers and Florida law officials. He certainly killed 20 men; some credited him with killing 40 or more.
"Wild Wild West"