Brendan Tarwater, 17, was arrested Monday on multiple charges after police said he was caught with three loaded weapons on the campus of Madison High School, according to Bexar County Central Magistrate's Office.
North East Independent School District spokeswoman Aubrey Chancellor said two handguns were found in his backpack and an AK-47 was discovered in a bathroom.
The sophomore student told district police he planned on using them if certain demands were not met.
"The student had said that he planned making some demands over the announcements later today at Madison High School," Chancellor said. "He didn't say specifically what those demands were, but he did say if those demands were not met, he had planned on committing violence."
Chancellor released this statement Monday evening: "By law, I cannot speak specifically about a student's discipline, but in an instance like this, typically a student could be expelled." Chancellor added Tarwater was not expected to be on campus any time soon.
Tarwater's parents notified school officials after they discovered their son was not at home when they woke up, Chancellor said. When his parents checked the house for weapons, they discovered that the three guns were missing, Chancellor said.
When the parents went to Madison, their son was already on campus. He was immediately taken into custody and the school was on lockdown for about one and one-half hours.
Yvella Allen, the parent of a Madison High School student, said she was relieved the weapons were found and that there was no violence.
"That does make me feel better but what about tomorrow?" Allen said. "(I) don't know what's going to happen tomorrow. What are they going to do to protect the kids now?"
"If these kids are bringing guns to school, they're doing it for a reason, and whatever they're doing it for, they need help with that," said Madison student Brittany Arizola. There are no metal detectors at the school.
Tarwater is being taken to the Bexar County Jail on charges including possession of weapon in prohibited places, a third-degree felony, and terroristic threat. Bond for each charge is $150,000.