No one came to Spring Woods High School on Monday suspecting a loaded handgun would be waiting, but it was.
"I mean it was really scary. People were shocked. Teachers were shocked. No one expected this to happen," said Mario Yepez, a Spring Woods sophomore.
Spring Branch Independent School District police say a 15-year-old freshman boy pulled out a .380 semi-automatic pistol in a classroom and a single shot was fired.
"When the weapon went off it missed the 25 students in the classroom, went through a door into the corridor. Fortunately no one was injured," said Chuck Brawner, Spring Branch ISD Chief of Police.
Investigators believe the gun accidentally discharged as the suspect was displaying it to a fellow student.
Chief Brawner it is the first bullet fired on a Spring Branch ISD campus in recent history. He does not believe metal detectors would be an effective deterrent to those who would bring firearms to school.
"In my opinion what metal detectors give you is a false sense of security," said Brawner citing numerous occasions when weapons have been smuggled onto to campuses across the country.
Brawner says after the shot was fired the student responsible attempted to hide the weapon in his back pack. It was discovered by responding officers and the student faces felony charges.
The student has not yet revealed to investigators why he brought the pistol to school.