While Columbine High School shooting survivor Anne Marie Hochhalter’s life was shaped by tragedy, the tenacious woman worked hard to ensure it was not defined by it.

Anne Marie Hochhalter, who spoke publicly about the long-lasting effects of gun violence after she was paralyzed in the 1999 mass shooting at Columbine High School in Colorado, was found dead on Sunday at her home in Westminster, Colo. She was 43.