America has always preferred heroes who weren’t clean-cut, an informal ode to the rugged individualism and pioneering spirit that defined the nation in previous centuries. The early 19th century saw the glorification of frontier folk heroes like Davy Crockett and Daniel Boone. After the Civil War, the outlaws of the West were more popular than the marshals, with Jesse James and Billy the Kid finding their way into dime novels. And at the height of the Great Depression in the 1930s, there were the “public enemies” - common criminals and coldblooded murderers elevated to the level of folk heroes by a public frustrated with their own inability to make a living honestly.

Among America’s most infamous “public enemies” and, perhaps, the most unique and controversial was Kate Barker. With her prominent, hawk-tipped nose and plump, doughy face, framed by a classic dark, curly coif and frilly day dresses to match, Ma Barker was as nonthreatening as they come. Nary a second glance was given to this grandmotherly figure by those who crossed her path, perhaps, at most a polite tip of the hat. Of course, as the age-old adage goes, appearances are often deceiving.

According to the FBI and portrayals in popular culture, not only was Ma Barker a crass, greedy, and highly manipulative individual who coaxed her sons into the abyss-like vortex of criminality, she was the matriarchal mastermind of one of the most notorious gangs of the Dirty Thirties era. The public devoured the countless articles that their action-packed crimes generated with gusto, but few could compare to the meteoric whirlwind of morbid excitement that erupted when the sensational story of the Ma Barker Gang made its rounds.

The Ma Barker Gang, as they were so branded, wasn't a typical band of small-time crooks. Quite the contrary, the unorthodox family-run enterprise was, as described by FBI Director J. Edgar Hoover, “the most vicious, cold-blooded crew of murderers, kidnappers, and robbers in recent memory".

The gang was as accomplished - and dangerous - as it was elusive, and between 1930 and 1933 alone, they made off with an estimated $3 million. In their heyday, the gang boasted some 25 members, and through it all, the Barker boys remained its core members. Blood, as per the Barker code, would always be thicker than water.

The Ma Barker Gang, which was reportedly governed by the middle-aged, misleadingly unassuming, yet apparently ride-or-die mother of the Barker boys, easily warranted a class of its own. The obvious novelty of the alleged gang leader's identity aside, the disturbing fates of the Barker brothers and many of their associates served as a cautionary tale about the dangers and delusions that ensue when one becomes consumed by unbridled avarice and arrogance.

But why were the Barker brothers, once innocent young lads, steered so far off the path of righteousness? What was the true depth of Ma's involvement in the gang's laundry list of despicable crimes? How did the once untouchable gang's winning streak culminate in such catastrophic disaster?

The pursuit of the Barkers was a piece of what made the FBI a national institution, and alongside similar efforts to bring John Dillinger and Bonnie and Clyde to justice, the “G-Men” became the symbol of law and order in the early 1930s. The FBI’s dissemination of information about Ma Barker all but cemented her notorious reputation, but in the decades since, FBI Director J. Edgar Hoover has become a controversial figure himself, and modern historians have reached different conclusions about Ma Barker’s involvement in the gang’s criminal activities.