A 21-hour-long standoff between police and a man ended with 5 dead -- including 4 children -- and a police officer critically wounded in Orlando, Florida. Police say Gary Wayne Lindsey Jr barricaded himself in an apartment after his girlfriend reported him for domestic violence. Nancy Grace looks at the tragic case with private investigator Vincent Hill, psychologist Caryn Stark, and  reporter John Lemley. The murder of a beautiful young teacher is a mystery with many twists, some involving police officials in Aliquippa, Pennsylvania.  BeaverCountian.com reporter John Paul Vranesevich and CrimeOnline reporter Ellen Killoran join Nancy to update the probe of the fatal ambush of Rachael DelTondo.