Unbehaun's reason for robbing the bank is surprising, though: He was homesick for prison.
The 74-year-old Unbehaun showed a Chicago-area bank teller a revolver in his waistband and told her softly over and over, "I don't want to hurt you." He drove to a nearby motel with more than $4,000 in loot and waited for police to arrive.
Confronted by police in the motel parking lot, Unbehaun dropped his cane, raised his hands and startled the officers by his apparent joy at getting nabbed. That's according to prosecutors and his own attorney.
He's scheduled to be sentenced later Thursday.