In california, an 80-year-old retired nun sentenced to prison for stealing more than $800,000 from the elementary school where she was principal. she says she needed the money to pay off her gambling debts. cnn's nick watt has the story. >> reporter: john, brianna, mary margaret krupper, 80 years old, a retired nun, retired principal, long time principal of a catholic elementary school here in california, a woman who had taken a vow of poverty, sentenced to a year and a day in prison for embezzling, basically stealing, more than $800,000 from the school where she worked. according to the feds,...