Just read another James brothers book - for some reason there's been a couple published lately. It's "The Lost Cause - The Trials of Frank and Jesse James." Author - James P. Muehlberger. Author talks about how hard it was to arrest and try the James brothers. Frank James, for example was tried twice but never convicted. No forensic evidence in those days, eyewitness testimony was unreliable as the robbers wore masks. Judges and attorneys received death threats, and in those days, jurors names and occupation were published in the local newspapers. If the posse didn't catch them right after the robbery, then it was almost impossible for the legal system as it was to arrest and try them. If a posse did catch a robber, it was a good chance there'd be a lynching. People got upset when their local bank was robbed, no FDIC in those days.