An immigrant from Uzbekistan allegedly drove a rental truck down a crowed Manhattan bike path, killing 8 people and injuring at least a dozen. Nancy Grace assembles an expert panel to discuss the deadliest New York terror attack since September 11, 2001. The panel includes terrorism expert Bruce Alexander, forensics expert Joseph Scott Morgan, forensic psychiatrist Dr. Daniel Bober, and investigative reporter Art Harris. Psychologist Chloe Carmichael joins Nancy, Art and co-host Alan Duke to look at new developments in the mysterious case of Sherri Papini.