@cbsnews: Newly released surveillance footage shows 35-year-old Jacob Pearson entering a Citibank campus in Hillsborough County, Florida, armed with a rifle before opening fire Wednesday. Authorities said Pearson was angry over a $2,500 credit card debt and had threatened to bring an AR-15 and a bulletproof vest to the building unless Citibank canceled a debt collection hearing. He later opened fire, killing a 41-year-old woman before being confronted and shot by Citibank employee John Fraley. Pearson died at a hospital. The Hillsborough County sheriff praised Fraley's actions, calling him a hero and crediting him with potentially saving lives on a campus with more than 3,200 people.