All three of Biden's main challengers expressed their horror on Twitter and called for concrete action to stop America's mass shooting epidemic.
According to Los Angeles County Sheriff's Department records published in a local newspaper, his father was arrested in June 2015 on suspicion of attempted battery on his wife.
Daniel Finn, Sean Yanez and Gus Ramirez all happened to be dropping their children off at Saugus High School in Santa Clarita on Thursday morning when teenage gunman Nathaniel Berhow, 16, opened fire with a.45 semi-automatic rifle.
Gunfire began around 7:30 a.m. and authorities estimated that the suspect took just 16 seconds to pull out the weapon, shoot five classmates and then himself.
Two victims were reported dead: a 16-year-old girl, and 14-year-old boy.
The other victims included a 15-year-old female, a 14-year-old male, and a 14-year-old female. "He doesn't move", Wegener said.
"I would say he (the boy) was hurting and couldn't ask for help", Axen said of the suspect, who was a track athlete at the school, involved in Boy Scouts and liked the outdoors, going on hunting trips with his father.
A Democratic senator was giving a speech on the Senate floor Thursday morning advocating for stronger gun control measures when an aide handed him a note, informing him there had been a shooting at a high school in California. Dr. Borazjani said they cleaned out the wound and removed the bullet, and the child is now recovering.
Students from Saugus High School in Santa Clarita, Calif., await instructions from law enforcement personnel before reuniting with their parents at Central Park on November 14, 2019. They said surveillance video showed that he carried the gun in his backpack.
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An official with the Henry Mayo Hospital said they are reportedly treating four injured victims.
One girl who knew him for years said he wasn't bullied and had a girlfriend.
"He was a quiet kid and I didn't see this coming", another neighbor said.
Saugus High School has about 2,400 students, according to the district.
Authorities were questioning her Thursday, searching for an explanation like so many others.
"I automatically knew something bad was happening", he says.
Those in the building barricaded themselves in classrooms trying not to make a sound until they were finally ordered to exit the rooms by police officers with guns drawn.
All district schools hold lockdown drills three times a year, including two in the fall that have already occurred, Nielson said.