Bryan Kohberger's sister is opening up more than three years after his slayings of the Idaho college students. In an interview with the New York Times published on Saturday, Melissa "Mel" Kohberger, who has largely kept quiet in the years since her brother murdered Kaylee Goncalves, 21, Madison Mogen, 21, Xana Kernodle, 20, and Ethan Chapin, 20, opened up about how the situation has affected her.