Authorities are still trying to figure out why a California teen brought a semi-automatic pistol to school on his 16th birthday, killing two fellow students and injuring three before turning the firearm on himself, and now they won't be able to get more insight from the suspect himself. NBC News reports that Nathanial Berhow died Friday, his mother at his side. Berhow "was being treated for a self-inflicted gunshot wound to the head, when he succumbed to his injuries," officials noted in a statement. Per an online obituary, the teen's father died in 2017, and a neighbor says that seemed to have a major effect on him. "Apparently he had a lot of stress from that," the neighbor tells NBC Los Angeles.
"There's nothing really that stands out [about the suspect]," Los Angeles County Sheriff Alex Villanueva tells CNN, noting the shootings appeared to be random. "He wasn't a loner. Wasn't socially awkward. Was involved in student activities. Student athlete. This is kind of out of the blue, shocking pretty much everyone who knew him." Authorites say Berhow didn't leave behind a manifesto, note, or journal, and didn't appear to be linked to any extremist or violent groups, per CBS News. Meanwhile, CNN reports the two teens who died after Thursday's shooting have been identified as Gracie Anne Muehlberger, 15, and Dominic Blackwell, 14. Of the three injured students, one has already been released from the hospital, while a 14-year-old girl and 15-year-old girl are expected to go home over the next few days. (Read more school shooting stories.)