The model’s parents, #CindyCrawford and Rande Gerber and his sister, #KaiaGerber are “in total shock” following his tragic passing, a source close to Kaia tells PEOPLE. “The family is in total shock right now. They are saddened beyond words,” the source says. “Kaia loved that Presley was so open about his struggles; his family was so proud that he was finding strength in helping others.” Tap the link for the full story. 📷: John Phillips/BFC/Getty