Key Figures
Kate ‘Ma’ Barker: Mother of Barker gang sons
George Barker: husband of Kate ‘Ma’ Barker
Ma Barker’s sons - Herman, Lloyd, Arthur ‘Doc’, and Freddie
Alvin Karpis: Barker-Karpis gang member
George Ziegler: gang member killed by Barkers
Kidnap victims
William Hamm: Minnesota brewer
Edward Bremer: Minnesota banker
J Edgar Hoover: Director of the FBI.