Unsociable' student gunman pulls semi-pistol out of backpack on his 16th birthday and unloads on five classmates in CA high school, killing three, before attempting suicide - as it's revealed death of his alcoholic dad may have triggered rampage
Shooting was reported at Saugus High School in Santa Clarita at 7.45am
Suspect described as 16-year-old Asian male in dark clothing was taken into custody and was being treated for self-inflicted gunshot would to the head
Los Angeles County Sheriff Alex Villanueva says first responders initially mistook the suspect for a victim because he was found shot alongside them
A 16-year-old girl and a 14-year-old boy were shot to death; surviving victims were described as two girls, ages 14 and 15, and a boy aged 14
Officers seized .45-caliber semi-automatic pistol that had no rounds left in it
Suspect's mother and girlfriend are being questioned and are said to be cooperating with the investigation
Gunman's childhood friend said the 16-year-old lost his father a year ago
Vigil for those hurt in the shooting will take place in Central Park in Santa Clarita at 7pm Sunday