A teenager who opened fire at his California high school, killing two students, used a "ghost gun" built from firearm parts, the Los Angeles County sheriff said.
The weapon was a "kit gun" with no serial numbers, and another kit gun was found at the family's home, Sheriff Alex Villanueva
told television station KABC.
It was unclear who assembled the gun. Weapons assembled at home, allowing owners to avoid registering them, are commonly called ghost guns.
Villanueva said the suspect’s father, who died in 2017, at one point had six firearms registered to him, but those guns had been lawfully removed from the home and were legally destroyed. He was then considered a "prohibited possessor" who could not legally own a gun, but Villanueva did not say why.