Brian Laundrie's sister speaks to protestors outside her home saying she doesn't know if her brother had anything to do with Gabby Petito's death.  Cassie Laundrie says FBI investigators have asked her not to make public comments, but that she felt she could no longer stay silent as the media disruption was upsetting her children. Asked if she believes her brother killed Petito, who was found dead in Wyoming’s Bridger-Teton National Park on September 19, Laundrie said, “I don’t know.” She also addressed said while she saw her brother while he was camping with his parents, that Gabby was not discussed.  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, Former Medical Director of The Psychiatric Ob-Gyn Clinic at Grady Memorial HospitalSheryl McCollum - Forensic Expert & Cold Case Investigative Research Institute Founder, ColdCaseCrimes.org, Twitter: @ColdCaseTips Joe Scott Morgan - Professor of Forensics: Jacksonville State University, Author, "Blood Beneath My Feet", Host: "Body Bags with Joseph Scott Morgan" Michael Ruiz - Reporter, Fox News Digital, TWITTER: @MikeRreports See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.