A 16-year-old boy who opened
fire at his Southern
California high school, killing two classmates and wounding three others before
shooting himself in the head, used a "ghost gun" built from parts, the local sheriff said on Thursday.
Nathaniel Tennosuke Berhow pulled the .45-caliber semi-automatic pistol from his backpack on Nov. 14, his birthday, and shot students at Saugus High School in the
Los Angeles suburb of Santa Clarita seemingly at random before turning the gun on himself.
The sheriff told KABC it was not yet clear if the teenage gunman put the weapon together himself.