Presley Gerber, the only son of supermodel Cindy Crawford, has died at 27 after years of struggling with mental health and drug addiction. @​AlexisMcAdamsTV reports Gerber was found dead Sunday at a California rehab facility. A cause of death has not yet been released. Just months ago, Gerber opened up about returning to treatment, saying he was "absolutely terrified" but knew he had to face what he'd been running from. His family is asking for privacy during what they call a "very difficult and painful time." Download the FOX News app to follow this developing story: ▻