A Full Life - A Special Edition of 20/20" airs Sunday, Dec. 29 (10:01-11:00 p.m. EST), on ABC, next day on Hulu . ABC News' ...

“20/20” looks at the case of Mary Winkler and the trial that shocked a nation. "20/20" explores the 2012 killing of 16-year-old Skylar Neese.