But he recalled that school administrators became concerned last year about Mr. Cruz’s behavior and alerted the faculty. “We received emails about him from the administration,” Mr. Gard said in an interview, adding that he did not recall the specific issues.

After the shooting on Wednesday, Mr. Gard said that several students told him that Mr. Cruz was taken with a girl at Stoneman Douglas High School “to the point of stalking her.”

In the interview with the Miami news station, the student said Mr. Cruz was a junior at Stoneman Douglas High School when he was expelled last year. He said that students would joke that if anyone were to open fire inside the school, it would be Mr. Cruz. Because of that, students feared him and mostly stayed away from him, the student said.

“A lot of people were saying that it would be him,” the student told WFOR-TV. “They would say he would be the one to shoot up the school. Everyone predicted it.”

Brandon Minoff, a student at…

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