Brian Laundrie has been missing since at least September 14. The person of interest in Gabby Petito's death told his parents that he intended to hike in the Carlton Reserve, but he has not returned. Three days before he left, Laundrie’s girlfriend Gabby Petito was reported missing by her family. Those knowledgeable with the rough terrain point out it would be difficult to survive in that area, which is now mostly underwater, for an extended period of time. There is no potable water and little dry ground to camp. Meanwhile, Laundrie's parents were followed by federal agents to a public library, where they hung out for a period of time, before heading to a meeting with an attorney.Joining Nancy Grace Today:Wendy Patrick - California prosecutor, author “Red Flags” www.wendypatrickphd.com 'Today with Dr. Wendy' on KCBQ in San Diego, Twitter: @WendyPatrickPHDDr. 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 HospitalJoe Scott Morgan - Professor of Forensics: Jacksonville State University, Author, "Blood Beneath My Feet", Featured on "The Piketon Massacre: Return to Pike County" on iHeartRadioAngenette Levy - Emmy-nominated Reporter & Anchor, Twitter: @Angenette5See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.