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CHICAGO (AP) -- Authorities say a 73-year-old ex-convict told investigators he became accustomed to life in prison and wanted to get caught when he robbed another bank so he could live his final years behind bars.

A federal complaint says Walter Unbehaun (un-beh-HOWN') walked into a suburban Chicago bank with a pistol and used the novel stickup line that he had just months to live. He wore no disguise during Saturday's heist that netted him $4,178.

When authorities tracked him to a motel Sunday, he immediately threw down his cane and surrendered, saying he knew they were there because he'd robbed a bank.

The Rock Hill, S.C., man made an initial court appearance Monday.

Unbehaun recently finished serving 10 years for bank robbery. He faces up to 20 more on the new charge.

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