Marlene Warren opened the door to flowers and balloons, delivered by a clown, but no one expected the gunshots that followed. Now the woman who investigators say dressed as that clown, killing the wife of her now-husband, is headed to trial.Joining Nancy Grace today:Kirk Nurmi - Jodi Arias former attorney & author of "Trapped with Ms. Arias" Dr. Angela Arnold - Psychiatrist, AtlantaJeff Cortese - Former FBI Special AgentDr. Katherine Maloney - Deputy Chief Medical Examiner, Erie County Medical Examiners office, Buffalo, New YorkLevi Page - Investigative reporter, CrimeOnline George Schiro - Lab director at Scales Biological Laboratory Inc.