Inside Robb Elementary School the 18-year-old gunman barricaded himself inside a classroom and fired indiscriminately at children and teachers using an AR-15-style semi-automatic rifle before police officers stormed the class and killed him.
The shooter had recently moved in with his grandparents, said Joseph Moreno, who lives next door to the shooter’s grandparents.
Moreno who spoke to the media said “the shooter was staying there with his grandparents because he got into a fight with his mom.”
Investigators have said that the gunman shot his grandmother before going to the school. She remained in serious condition Wednesday afternoon.
Investigators shed no light on the motive for the attack, which also left 17 people wounded.
Texas Gov. Greg Abbott said the gunman, a resident of the small, predominantly Latino town about 85 miles west of San Antonio, had no known criminal or mental health history.
The massacre was the deadliest school shooting in the U.S. since a gunman killed 20 children and six adults at Sandy Hook Elementary in Newtown, Connecticut, in December 2012 and now this is one of the the deadliest school shootings to occur in Texas; eclipsing the 1966 shooting on the campus of the University of Texas that left 18 people dead in the state capital.