Early one Tuesday morning, John Brooks went to his teenage daughter’s room to make sure she was getting up for school and found her room dark and “neater than usual.” Casey was gone, but he found a note: The car is parked at the Golden Gate Bridge. I’m sorry. Several hours later, a security video was found that showed Casey stepping off the bridge. Brooks spent months after Casey’s suicide trying to understand what led his 17-year-old daughter to take her life. In THE GIRL BEHIND THE DOOR, Brooks shares what he learned and asks, “What did everyone miss? What could have been done differently?”