4. BUTCH CASSIDY (1866-1908)

Calling Card: Cassidy was the leader of the Wild Bunch crew.
Casualties: There are no deaths associated with Cassidy.
Complex Says With the Wild Bunch, Butch Cassidy had one of the most badass criminal entourages you will ever see. These dudes were on some real old-time western shit, sticking up everything from banks to trains.

Even though Cassidy's criminal activities are well documented, his fate isn't. Historians aren't 100% sure exactly what happened to him. Some believe he died in South America, which is where he ran to after robbing one too many trains and getting bounty hunters on his ass. Others, however, say that he returned to the United States after spending time in South America and became a mercenary.