Suspect Dimitrios Pagourtzis, 17, has cooperated with police, said Galveston County Magistrate Mark Henry said. Henry denied bail for the student, who is accused of capital murder of multiple people and aggravated assault on a public servant.
Students at Santa Fe High School, not far from Houston in southeastern Texas, scrambled for safety after they heard shots just after class began Friday morning. Nine students and one teacher were killed, a law enforcement official has said
Pagourtzis said little during a video court appearance, answering "Yes, sir" when asked whether he wanted a court-appointed attorney. He was not asked to enter a plea.
The probable cause affidavit says he told an investigator he spared people he liked because he wanted his story told.
The alleged shooter used a shotgun and a .38 revolver that were legally owned by his father, Gov. Greg Abbott told reporters. Two school resource officers were on the campus and confronted the shooter "early on in the process," Abbott said.