A 21-hour-long standoff between police and a man ended with five people dead — including four young 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, New York psychologist Caryn Stark, and Crime Stories investigative reporter John Lemley.

Also read: HORROR: Gunman kills self, 4 child hostages after 21-hour standoff

The murder of a beautiful young Pennsylvania teacher is a mystery with many strange twists, some involving police officials in the small town of Aliquippa. John Paul Vranesevich — editor/reporter with BeaverCountian.com — and CrimeOnline reporter Ellen Killoran join Nancy to update the probe of the fatal ambush of Rachael DelTondo.

SEE IT: Police chief placed on leave following Mother’s Day slaying of teacher Rachael DelTondo [VIDEO]

“Crime Stories with Nancy Grace” is a national radio show, heard on SiriusXM’s Triumph Channel 132, five times a day. You can also subscribe and download the daily podcasts at iTunes and Google Play.

[Feature Photo: AP/John Raoux]