 Tragedy in Chicago. A woman postal carrier shot and killed sitting in her vehicle on the city's south side. Friday before noon it happened. Elise Foster, president of the National Letter Carriers Association, wants the killer caught. They need to be prosecuted now. We are federal employees. How dare you? And then you think you can just get away with it? My members are scared to go to work. A reward of up to $250,000 for information leading to an arrest and conviction. You're listening to ABC News.