Florida police now say Brian Laundrie, the boyfriend of missing Gabby Petito, is a person of interest in her disappearance. The 22-year-old woman mysteriously vanished while the couple was on a road trip. Gabrielle “Gabby” Petito and Laundrie, 23, embarked on a cross-country road trip this summer, but Laundrie returned to Florida. Petito's whereabouts are unknown. Gabby last spoke with her mother via FaceTime on August 23 or 24.Joining Nancy Grace Today:Joseph Petito - Victim's FatherJames Shelnutt - 27 years Atlanta Metro Area Major Case Detective, Former S.W.A.T. officer, Attorney, The Shelnutt Law Firm, P.C., www.ShelnuttLawFirm.com, Twitter: @ShelnuttLawFirmDr. 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 iHeartRadioMike King - Host: "ProfilingEvil" on YouTube, Former Police Officer (Ogden, Utah), Former Chief Investigator: Weber County Attorney’s Office, Former Chief of Staff: Utah Attorney General’s Office, Author: "Deceived, An Investigative Memoir of the Zion Society Cult", www.ProfilingEvil.com, Instagram/Twitter: @Profiling EvilAndrea Olson - EastIdahoNews.com, Twitter: @NewsWithAndreaTIPLINE: Suffolk County Police Department 1-800-220-8477  GoFundMe: "Help us find Gabby" See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.