Kendrick Ray Castillo, 18-year-old who sacrificed his life to save other students during shooting in suburban Denver high school, loved robotics, helping the elderly in his community and making people laugh, his friend told Reuters. Cece Bedard, who knew Castillo since elementary school, said she broke down in tears when she heard her friend had died but was not surprised at his selfless act.

He was a high school senior, set to graduate this week. But instead of celebrating Kendrick Castillo's graduation, the family of the 18-year-old will be mourning his death. The shooting happened at the end of the school year in British literature class. The toll exacted by the shooters could easily have been worse. Deputies arrived within two minutes of the first call, officials said.