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Advertisement Invitation To A Murder Saturday, Dec. 13, at 10 p.m. ET/PT.   Mark and Donnah Winger seemed to have it all – successful careers, a newly adopted baby girl, and a nice home in Springfield, Ill. But their seemingly peaceful and happy family life was shattered in August 1995. That's when Mark says he found an intruder in his home, beating his wife to death with a hammer.   Mark shot and killed the man right there. Investigators determined he had acted in self-defense, and called him a hero.   But as correspondent Richard Schlesinger reports, while the case seemed open and shut, after several years, it turned out to be anything but.   Watch a preview.   Watch Schlesinger's reporter's notebook.     Also, at 9 p.m. ET/PT, "Deadline For Justice." An aspiring network anchor makes tragic headlines with her own murder. Harold Dow reports.     CBS Evening News  |  The Early Show  |  48 Hours  |  60 Minutes  |  CBS Sunday Morning  |  Face The Nation  |  Up To The Minute U.S.  |  World  |  Politics  |  Sci-Tech  |  Health  |  Entertainment  |  Business  |  Sports  |  Strange  |  Travel  |  Opinion  |  Blogs Videos  |  In-Depth & Photos  |  Puzzles & Toons  |  Mobile Services  |  E-Mail Services  |  RSS Feeds  |  Podcasts Help  |  Advertise  |  Terms Of Service  |  Privacy Statement To unsubscribe or change your subscription options, click here. Contact: Email Administrator, CBSNews.com, 524 W. 57th St., Room 514/1, New York, NY, 10019 ©MMVIII, CBS Interactive Inc. All Rights Reserved.