Lefty Rosenthal was a gangster to the core, meaning he wasnt some weak frontman like Glick. In fact, Rosenthal belonged to the David Yaras/Lenny Patrick crew. Before going to Vegas, Rosenthal was in Miami together with Yaras and they were involved in numerous bombings in that same area, including many gambling and loan sharking operations. Another of Rosenthal's alleged mentors was also old time Outfit "member" Les Kruse.