From Wikipedia. "Kate 'Ma' Barker (born Arizona Donnie Clark; October 8, 1873 – January 16, 1935) was the mother of several criminals who ran the Barker gang from the 'public enemy era', when the exploits of gangs of criminals in the U.S. Midwest gripped the American people and press." Pictured her with her Thompson gun in an undated picture of the legendary matriarch.