Authorities shed more light on some of the suspect's digital footprint in the weeks and months before Tuesday's mass shooting.
In September 2021, suspected gunman Salvador Ramos asked his sister to buy him a gun and she "flatly refused," Steven McCraw, director of the Texas Department of Public Safety, told reporters during a briefing Friday. He did not note where this exchange took place.
On Feb. 28, in an Instagram group chat with four people, they discussed "Ramos being a school shooter," McCraw said.
The next day, on March 1, in an Instagram chat with four people, Ramos discussed buying a gun, according to McCraw.
Two days later, on March 3, in another four-person chat, someone said, "Word on the street is you are buying a gun," according to McCraw. Ramos reportedly replied, "Just bought something."
On March 14, Ramos posted on Instagram, "Ten more days," according to McCraw. Someone replied, "Are you going to shoot up a school or something?" to which Ramos replied, "No. Stop asking dumb questions. You'll see," according to McCraw.
Meta said it is working with law enforcement regarding the concerning messages sent on Instagram.
"The messages Gov. Abbott described were private one-to-one text messages that were discovered after the terrible tragedy occurred," Meta spokesperson Andy Stone said on Twitter. "We are closely cooperating with law enforcement in their ongoing investigation."
Investigators are also looking into people the suspect may have communicated with in video game chat rooms who "may have known something," McCraw said.