Reporter's Notebook: The elements of a sting
You need more than you think to catch a killer on tape. "48 Hours" correspondent Troy Roberts explains what investigators needed in order for their sting operation to be a success. The right evidence could send millionaire Dino Guglielmelli away for life. For more, watch "The Millionaire, the Model & the Hit Man" Saturday, Aug. 13 at 9 p.m. ET/PT on CBS.