Adrian Mendez, a night manager at Wendy’s in Uvalde, where the shooter worked until last month, said he “went out of the way to keep by himself”.
“You know how my guys talk to each other and are friendly? He wasn’t like that. No one really knew him,” Mr Mendez said. Ramos had worked at the restaurant for a year.
John Michael, 18, who also worked with Ramos, said he liked to joke around. “This is really horrifying,” he added.
One former friend, Santos Valdez Jr., 18, said he had known Ramos since they were young. They used to play shooter video games including Fortnite and Call of Duty.
He said Ramos once turned up to a park with cuts all over his face.
“Then he told me the truth, that he’d cut up his face with knives over and over and over,” Mr Valdez said, according to the Washington Post. “I was like, ‘You’re crazy, bro, why would you do that?’”
Ramos reportedly said he did it for fun, according to Mr Valdez.