The Fleagle Gang

(Wikipedia) The Fleagle Gang was a group of early 20th century American bank robbers and murderers. They were found and executed or killed after robbing the First National Bank in Lamar, Colorado. Their cases were the first in which the Federal Bureau of Investigation (FBI) used a single fingerprint as part of the evidence leading to a conviction.
They were also suspected to have committed a series of previous bank robberies over a 10-year period. Continued