Yesterday, 18-year-old Salvador Ramos opened fire at an elementary school in a small Texas town. Before driving to the elementary school in his grandmother’s truck, he shot his grandmother.

Ramos’ lived with his grandparents. His grandfather, Rolando Reyes, wasn’t home when the shooting happened. He heard about it from a neighbor and later told ABC News, “It still hasn’t sunk in yet.”

According to Reyes, Ramos was a quiet boy and they never really had a real conversation. The teenager didn’t go to school during his senior year and wasn’t going to be able to graduate.

Ramos had recently celebrated his 18th birthday. As a way of celebrating, Ramos’ grandmother took him out to dinner at Applebees. What his grandparents didn’t know is that Ramos secreted celebrated by buying guns and ammunition.

Reyes explained that if he had known his grandson bought guns he “would have reported him.” He said, “I don’t like weapons.”

Watch the video below to hear more of what Reyes had to say about this grandson.

While Reyes described Ramos as “quiet,” not everyone who knew him described him that way. Ramos used to work at Wendy’s and some of his former co-workers saw signs of aggressive behavior and called him “rude” and “threatening.”

Santos Valdez Jr. used to be friends with Ramos. He told The Washington Post that Ramos was bullied because of a speech impediment. He said Ramos once admitted to him that he cut his own face with a knife. 

Ramos’ mother has yet to speak out about her son and the shooting. Ramos’ grandfather simply said the Ramos and his mother didn’t live together because of “problems,” but one of Ramos’ former high school classmates, Nadia Reyes, gave a little bit more insight to the Post. She explained, “He posted videos on his Instagram where the cops were there” at his mother’s house. She added, “He’d be screaming and talking to his mom really aggressively.”

Another one of Ramos’ former classmates told CNN that Ramos texted him a picture of firearms and ammunition just days before the school shooting. He explained, “He would message me here and there, and four days ago he sent me a picture of the AR he was using… and a backpack full of 5.56 rounds, probably like seven mags.” He added, “I was like, ‘Bro, why do you have this?’ and he was like, ‘Don’t worry about it.’”

Does it surprise you that Ramos’ grandfather didn’t see any warning signs when several former classmates and co-workers did? What do you think could have been done to prevent this tragedy?