(CNN)A football coach. An athletic director. And young, eager and forward-looking students.

They were among the 17 people killed by a gunman Wednesday at Marjory Stoneman Douglas High School in Parkland, Florida.

Broward County Sheriff Scott Israel said Thursday that all families who lost loved ones in the shooting have been notified.

Alyssa, 14, was a student at Stoneman Douglas and a soccer player for Parkland Travel Soccer.

Lori Alhadeff, Alyssa's mother, told HLN she dropped her daughter off at school Wednesday and said, "I love you." When the mother heard about the shooting, she hustled to school, but was too late.