Frederick Grant Dunn (1905–1959)[1] was an American criminal, burglar and bank robber whose career spanned over four decades from 1919 until his mysterious death in 1959.

[2] He led a small gang during the 1940s and 1950s, Dunn becoming referred to by the press as "the modern John Dillinger", and whose activities eventually resulted in his being listed on the FBI's Ten Most Wanted in 1958.

[3] Born in 1905, Frederick Dunn's criminal career began when he was convicted of breaking and entering and larceny at the age of 14.

Ten days after his arrival in Sioux City, Dunn managed to obtain a smuggled pistol and escaped with another inmate.

Dunn was eventually given a 40-year prison sentence for bank robbery as well as an additional 30 years for "assault with intent to kill" as a result of his escape attempt.

[3] Dunn quickly returned to crime and, within two years, was being referred to as a "modern-day [John] Dillinger" for his skill in using nitroglycerine in blowing open safes.

Although they locked everyone in the vault, one of the bank owners, Carl Thomas, managed to get free and grabbed a rifle which he used to wound one of the robbers as they made their getaway.

Prior to sentencing, hacksaw blades were found in Dunn's cell and he later confessed to planning a jail break.