Roughest Prisons
Frank was involved in armed robberies, too. Therefore, he’d been to some of the toughest prisons in the country, seemingly moving around them. However, he escaped from a Louisiana one, which brought experience to the team of escapees.
The Anglin Brothers
The Anglin brothers were notorious for bank robberies, but they weren’t violent. They only hoped to get large amounts of cash. It took a while to catch them, and they ended up in an Atlanta prison, where they met Frank. This trio had common interests.