"Beside him, there was one guy in handcuffs," he said.
"I just heard somebody screaming, and then after that, I heard the shots," another student told KPRC.
The Houston shooting comes roughly a month after the deadly shooting at a Newtown, Connecticut, elementary school that ended with 26 people -- including 20 children ages 6 and 7 -- dead.
"We know that there is significant national dialogue regarding the frequency, unfortunately, of shootings like this on public school and college campuses," said Carpenter. "Though we never expected to be a central part of this discussion, we hope that things can be learned from it."