The history of law enforcement in the Twin Cities, as in the rest of the United States, has been deeply influenced by race. Since the early twentieth century, many Minnesotans of color have responded to racial targeting and police brutality by forming community organizations and citizen patrols; others have served as officers themselves and grappled with racial inequality inside the police force.

In early 1953 Minnesota’s new US Attorney, George MacKinnon, began an attack on organized interstate prostitution in the Upper Midwest, centered in Minnesota on John’s Bar and Funhouse in Northeast Minneapolis. When the campaign ended in mid-1956, John’s Bar had lost its license, and 110 men and women had been convicted of violating the Mann Act.

In 1952 Russell Heim (1886–1960) was a practicing physician and, after 1942, Hennepin County’s elected coroner. The Minneapolis Star called his narcotics prosecution “one of the most sensational trials of a public official…in the history of Minnesota federal courts.”

On Saturday, November 12, 1955, Kenneth E. Lindberg, cashier of the Northern State Bank of Thief River Falls, met in the bank with a man who had identified himself as Herbert Johnson of the Johnson Wax Company. Lindberg was never seen alive again in Thief River Falls again.

Employing the racial prejudices and fantasies of elite male clients once used against her, Ida Dorsey established herself as one of the Twin Cities’ most notorious madams, running multiple brothels between the 1880s and the 1910s. As a woman of color in an industry dominated by white women, she demonstrated herself an adept entrepreneur and real estate owner when most women had neither income nor property.

Lynching is widely believed to be something that happened only in the South. But on June 15, 1920, three African Americans, Elias Clayton, Elmer Jackson, and Isaac McGhie, were lynched in Duluth, Minnesota.

In the annals of Minneapolis crime one man occupies the place held by Al Capone in Chicago and Meyer Lansky in New York and Miami: Isadore Blumenfeld, also known as Kid Cann. He was a lifelong criminal who made fortunes in liquor, gambling, labor racketeering (all protected through political corruption), and real estate. Only late in life did he serve more than a year in prison. He retired in Florida and died rich.

The Barker‒Karpis gang, a revolving cast of Midwestern criminals, shuttled in and out of St. Paul in the 1930s, committing robberies and kidnappings under the protection of a corrupt police force.

National Prohibition went into effect January 17, 1920. On March 23—sixty-six days into Prohibition—federal liquor agents arrested Oscar Martinson, sheriff of Hennepin County. Next came William M. Nash, Hennepin County Attorney, indicted April 6, arrested May 13. Martinson pleaded guilty. Nash was acquitted, but Governor J. A. A. Burnquist removed him from office. Nash and Martinson were the highest-ranking Minnesota law enforcement officials prosecuted under Prohibition.