St. Paul's Secret Gangster Agreement: The Minnesota History Nobody Taught You
Most Minnesotans know St. Paul as a state capital with a great arts scene, beautiful historic neighborhoods, and some of the best winter architecture in the country. What most people don't know is that for nearly four decades in the early twentieth century, the city was also the unofficial capital of American organized crime. Not because city leaders couldn't stop it. Because they designed it that way.
How the O'Connor Layover Agreement Started
On June 11, 1900, the city of St. Paul promoted a detective named John O'Connor to Chief of Police. Within months of taking office, O'Connor quietly reached out to criminals throughout the Midwest with an offer they weren't likely to refuse.
St. Paul would be a safe city for them to live and operate out of, no interference from law enforcement, as long as three conditions were met.
Criminals had to check in with authorities when they arrived in town. They had to agree to pay regular bribes to city officials. And they could not commit major crimes inside St. Paul's city limits.
To manage the flow of incoming criminals, O'Connor brought in a liaison from the underworld. William "Reddy" Griffin served as the first keeper of this system, operating out of the Hotel Savoy in downtown St. Paul. When criminals arrived, they stopped to see Griffin, paid their dues, and went on with their lives.
After Griffin died in 1913, a man known as "Dapper" Dan Hogan stepped in to run operations. Hogan himself was killed by a car bomb in December 1928, a murder that was never solved.
America's Most Wanted, Living in Minnesota
The agreement made St. Paul one of the most sought-after addresses in American crime.
John Dillinger and Billie Frechette, Ma Barker and her sons, Babyface Nelson, and Alvin Karpis all used St. Paul as a base or a layover at various points during this era.
Law enforcement across the country hunted these figures relentlessly. In Minnesota, they were essentially untouchable.
The system held together for so long because every party involved had a financial reason to keep it intact. Bribes flowed steadily to city officials. Criminals who broke the rules were pressured by their peers because any violation would bring outside scrutiny and end the financial arrangement for everyone.
O'Connor himself retired from the force in 1920 and died in California on July 4, 1924. Nearly 4,000 people attended his funeral at the St. Paul Cathedral.
[INTERNAL LINK: Twin Cities history and St. Paul neighborhoods guide]
How the Agreement Finally Collapsed
After Prohibition ended in 1933, many of the city's criminal figures turned to kidnapping for income.
In June 1933, the Barker-Karpis gang kidnapped Hamm's Brewery president William Hamm Jr. In January 1934, the same gang took Schmidt Brewing Company heir Edward Bremer from his car after he dropped his daughter off at school.
These high-profile kidnappings drew national attention and forced the federal government to intervene.
Congress passed expanded crime laws in 1934 that gave the FBI broader jurisdiction to pursue gangsters in cities like St. Paul.
At the same time, journalist Howard Kahn had reached his limit. Kahn hired a Chicago detective named Jamie Wallace, who wiretapped the St. Paul Police Department for over a year. The recordings captured officials tipping off organized crime members in real time.
In July 1935, Kahn's newspaper, the St. Paul Daily News, published a full exposé on the corruption inside the police ranks.
The fallout was swift. Dozens of officers and city officials resigned or were convicted. The O'Connor Layover Agreement was finished.
Why This Story Still Matters
The O'Connor era is a reminder that the Twin Cities have a layered, complicated, and genuinely fascinating past that goes far beyond what makes it into textbooks.
St. Paul today is a thriving, historically rich city with world-class neighborhoods and one of the most distinctive housing markets in the region.
Understanding where it came from, including the chapters that don't come up at dinner, is part of what makes this place worth knowing deeply.
Thinking about buying or selling in the Twin Cities? Let's talk. Text Darin Bjerknes at 612-702-5126 or DM on Instagram @darintheminnesotan.
