The father of two survivors of February's mass shooting at Marjory Stoneman Douglas High School in Parkland, Florida, was fatally shot by an armed robber in his convenience store Tuesday. Ayub Ali, 61, was stocking shelves when a robber forced him to open the cash register. The robber took the money and left, but then returned to shoot Ali, who was pronounced dead at a nearby hospital. A suspect identified as Tyrone Fields Jr., 19, was arrested Friday based on security camera footage from the store.