The mother of one slain student said her daughter may have been targeted because she rejected advances from Pagourtzi, who was an ex-boyfriend of her daughter's best friend.
The student, who is accused of capital murder of multiple people and aggravated assault on a public servant, was denied bail at a brief court hearing later Friday.
He also told police that he avoided shooting students he liked "so he could have his story told", according to the probable-cause affidavit.
Information from his cellphone and computer showed "not only did he want to commit the shooting, but he wanted to commit suicide after the shooting", said Texas Governor Greg Abbott, briefing reporters.
Valerie Martin, a teacher at the junior high school in Santa Fe, said she had Mr. Pagourtzis in her pre-A.P. language arts class previous year.
Abbott says the suspect used a shotgun and.38-revolver he obtained from his father. He says he's driving from Colorado to Santa Fe, about 30 miles southeast of Houston, to be with his family.
"Two school resource officers were on the campus and confronted the shooter early on in the process", Abbott said, reported CNN. Law enforcement officials were working to render the items safe, the school district said. But the canisters had no detonation device, and the pressure cooker had no explosive material, Henry said. But authorities now believe those two were not connected to the crime, the official said. Santa Fe students Aaron Kyle McLeod, Angelique Ramirez, Chris Stone, Jared Conard Black, Kimberly Jessica Vaughan, Shana Fisher, Christian Garcia and Sabika Sheikh were confirmed dead, along with art room teacher's aide Cynthia Tisdale and teacher Ann Perkins. The wounded included a school police officer who was the first to confront the suspect and got shot in the arm.
This isn't the first time Acevedo has called for gun control after a mass shooting.
Lucretia Martinez, 7, stands before various momentos people have left during a candlelight vigil in Santa Fe, Texas, for the victims of the mass shooting on May 18, 2018.
Trump said after the shooting Friday that his administration would "do everything in our power to protect our students". Rabon said he followed his teacher, who went to investigate.
The late-night host said lawmakers are "too cowardly" to take action because "they care more about the support of the [National Rifle Association] than they do about children". "It's gut wrenching", Ms. Muehe said, adding she was deeply proud of her son for warning others about the danger unfolding inside the school. He and his friends went to a back door in the classroom, which leads to a small courtyard, but the door was locked.
When the shooter left their classroom, Evan and other survivors barricaded the door and waited for police, who eventually helped them evacuate to safety.
"He then said that if the rest of us moved, he was going to shoot us", Quintanilla said.
Angelica Martinez, 14, told CNN that an alarm sounded, as well as gunfire.
And shock mixed with a tragic sense of familiarity as details emerge about the shooting at Santa Fe High School. "Give us our time right now, thank you", she said. "I'm kind of dumbfounded". She said that she had heard gunshots. I'm not ashamed to admit I've shed tears of sadness, pain and anger.