The new book Gangster Hunters recalls J Edgar Hoover and his so-called ‘G-Men’ who took down some of the biggest criminals of the time

John Oller’s new book tells how the FBI took down John Dillinger, Baby Face Nelson, Bonnie and Clyde and other celebrity criminals of the 1930s, as President Franklin Delano Roosevelt waged his “war on crime”. In prose fast as an Essex-Terraplane getaway car, Oller recounts and deconstructs the myths that grew around such bank robbers, kidnappers and killers. He also spotlights the agents who chased and caught and sometimes killed the criminals or were killed themselves – names long eclipsed by that of J Edgar Hoover, who led the FBI for 48 years.

“Hoover was such a larger-than-life figure and he wanted to keep it that way,” Oller says. “He wanted his agents to be anonymous. If any name was going to be associated with the FBI, he was going to be it. And he pulled it off. That’s the reason none of these guys that I write about have ever been known. They kept it that way.”