An A&E docu-series suggests investigators ignored several witnesses who claimed to have seen Laci Peterson walking her dog at a time that would have excluded Scott Peterson as the killer. Their testimony was not included in the trial that sent Peterson to California’s death row for murdering his wife in December 2003.

Nancy Grace examines the claim with Florida Gulf Coast University forensics anthropologist Dr. Heather Walsh-Haney, Los Angeles psychologist Dr. Bethany Marshall and RadarOnline reporter Alexis Tereszcuk.

Read also: Scott Peterson says he had a ‘terrible physical reaction’ to Laci’s death, while detective says the convict killer had ‘little reaction’

“Crime Stories with Nancy Grace” is now 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.

ADDITIONAL Scott Peterson Coverage:

‘I couldn’t feel my feet on the floor’: Scott Peterson says he’s shocked he was convicted of killing Laci Peterson and unborn son, Conner

The real reason Scott Peterson killed his wife: Aphrodite Jones talks Peterson’s true motive and CrimeCon [EXCLUSIVE]

CrimeOnline Evidence Locker: Watch the Scott Peterson interrogation tapes

Scott Peterson’s last message to Laci revealed to the public for the first time

[Feature Photo: Handout]