Heidi Planck is last seen leaving her son's football game at halftime. When she doesn't pick up her son at school on her scheduled day, family and friends realize something is wrong. Her dog is found 12 miles away from her home in a residential high rise, roaming the halls, but there's no sight of the 38-year-old. Now, police believe Planck is dead and are searching a nearby landfill for her body.Joining Nancy Grace Today:Darryl Cohen - Former Assistant District Attorney, Fulton County, Georgia, Defense Attorney, Cohen, Cooper, Estep, & Allen, LLC, www.ccealaw.comDr. Angela Arnold - Psychiatrist, Atlanta GA www.angelaarnoldmd.com, Expert in the Treatment of Pregnant/Postpartum Women, Former Assistant Professor of Psychiatry, Obstetrics and Gynecology: Emory University, Former Medical Director of The Psychiatric Ob-Gyn Clinic at Grady Memorial HospitalKaren L. Smith - Forensic Expert, Lecturer at the University of Florida, Host of Shattered Souls Podcast, @KarensForensic, barebonesforensic.comJohn Elwood - Deputy Chief, Manatee County Search and Rescue, www.manateecountysar.org, Twitter: @KarmatheSARdog, Principal Evaluator for the National Search Dog Alliance, Instructor/Evaluator National Association of Search and Rescue, 35 Years Sarasota County Fire Department,Mara Montalbano - Digital Reporter, InsideEdition.com, Twitter: @maramontalbano