A Parkland student who was on campus during last year’s deadly shooting and was recently diagnosed with post-traumatic stress disorder has taken her own life. She was 19. Sydney Aiello’s mother told CBS Miami her daughter often felt sad recently, but never asked for help. The recent Marjory Stoneman Douglas graduate also struggled to take college classes because she feared being in a classroom. The teen lost close friend Meadow Pollack in the Feb.