Teacher and bride-to-be Ellen Greenberg is found inside a locked apartment stabbed 20 times, including the back of the neck. Her body is discovered by her fiancé after he returns from a workout to find the apartment door locked from the inside. 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 GreenbergsStephanie Farr - Reporter, Philadelphia Inquirer, Twitter: @FarFarrAway