A clerk reportedly failed to include the Mississippi sentence information in Cooper’s file, and jail staff released him.
Cooper turned himself in several days later.
In a more recent embarrassment for law enforcement officials in Chicago, two convicted bank robbers escaped from a high-rise federal lockup in December by climbing down the side of the building on a rope made of bed sheets and jumping into a cab.
Authorities recaptured both men, one of whom remained on the run for about two weeks. Officials have yet to provide a public explanation of the jailbreak.