Teacher and bride-to-be Ellen Greenberg is found inside a locked apartment stabbed 20 times, including the back of the neck. It's ruled a suicide but does the evidence support the claim? Greenberg's family has filed a lawsuit against the Philadelphia County Medical Examiner's Office to compel officials to change the cause of death back to homicide or undetermined.Joining Nancy Grace today:Sandee Greenberg - MotherJosh Greenberg - FatherDarryl Cohen - Former Assistant District Attorney, Fulton County, Georgia, Defense Attorney Dr. Angela Arnold - Psychiatrist, Atlanta Ga www.angelaarnoldmd.com Tom Brennan - Private Investigator for the GreenbergsJoe Scott Morgan - Professor of Forensics Jacksonville State University, Author, "Blood Beneath My Feet" featured on "Poisonous Liaisons" on True Crime NetworkBrian Sheehan - reporter, WHP-TV Local 21