Dallas County September 26, 2019 10:20 pm ‘Mistake of Fact' Defense in Play in Guyger Murder Trial A former Dallas County prosecutor says the Guyger murder case will come down to her ‘mistake of fact’ defense. Wake Up to Something Good 0:34 Pet of the WeeK: Bailey! 2:06 North Richland Hills teen killed in hit-and-run 3:07 Demonstrators gather outside of NRA Convention in Dallas 2:00 Fort Worth gallery uplifts community while showcasing artist of color 1:30 Dallas sees uptick in car vandalism