Inseparable since kindergarten, Jessica Rasdall, right, and Laura Gorman, left, had always been a dynamic duo. Growing up in St. Petersburg, Fla., the best friends experimented with makeup, dyed each other's hair and loved to have fun. But years later that would all change in an instant as a girl's night out turned fatal. "I am going to wake up every day for the rest of my life knowing I killed my best friend," Rasdall said from prison.
Watch the "Secret Life of Teens" on "20/20" FRIDAY at 10 p.m. ET. (Courtesy of the Rasdall Family)