19-year old Sydney Aiello survived one of the worst school shootings in America history and couldn’t deal with the fact that she lived and 17 other people didn’t, including her friend Meadow Pollack.

After graduating high school, she was attending college but struggled to stay in lass as she was afraid of being in a classroom.

According to reports, Aiello was diagnosed with post-traumatic stress disorder and committed suicide last weekend.

Ty Thompson, Marjory Stoneman Douglas High School Principal, is under investigation per Miami Herald. The investigation is about the turmoil that happened during the shooting such has emergency protocols and if warning sings were missed.