Willie Lewis was considered a pioneer of the one-two punch, which is generally credited to have been created by Jem Belcher. In 1920, Lewis was shot three times by an assailant at the Chateau-Thierry cabaret which Lewis owned. He barely survived. He died of cancer in 1949 in New York City.
Source: "Who Lies There? Boxer's Obituaries," by Johnny Bos & Mike DeLisa (Cyber Boxing Zone Press, 2008)