Shocking turn in mystery surrounding murder of 2nd grade teacher after home "bleached" clean, and mother-in-law runs down son-in-law after he exposes sex affair

When police responded to a 911 call from Vanessa MacCormack's husband that his wife was dead on her kitchen floor, they smelled the strong odor of bleach. Evidence the teacher's killer tried to clean up the murder scene helped finger a suspect. Nancy Grace is joined by reporter Ed Payne and psycho-analyst Dr. Bethany Marshall to look at the case. A Florida woman allegedly tried to run over her daughter's husband, but not because she didn't like him. Maybe she liked him too much. Police say Kathleen Davis, 58, had an affair with her son in law, but the relationship went sour when he told his wife -- her daughter -- about it. Nancy and guests dig into the story.