The students themselves aren't so sure about going back to school.

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MURRYSVILLE, Pa. -- The crime scene is clear, and restoration work beginning inside Franklin Regional Senior High School so that it's ready for kids to return to class Monday.

But the students themselves, the ones who witnessed a stabbing rampage early Wednesday morning, aren't so sure.

"I think if I walked in there, I might just freeze. I wouldn't be able to move. I just need time to just cope," said Brett Hurt.

Hurt was one of 21 students and an adult security guard injured by the suspect, Alex Hribal, 16.

Hribal is being held in a juvenile facility without bond. He faces 21 charges of aggravated assault, four charges of attempted homicide and a charge of carrying a weapon on school grounds.

"I just hope that one day ... I can forgive him and everyone else who got hurt can forgive him. Most of all, he needs to forgive himself," Hurt said of the suspect, who he said he did not know well before the incident.

Brett, who was stabbed in the back, went home Thursday afternoon, along with another student who was hospitalized at Forbes Regional Medical Center. There are two others in fair condition there. Two more at Forbes will require further surgery and a third is in critical condition but not using a ventilator.

"The first two that came here, if they had required transport downtown by ambulance, would not have not survived," said Dr. Christoph Kaufmann, "The 30-minute drive to downtown Pittsburgh -- they would have bled to death."

At UPMC Presbyterian Hospital, one victim, Jared Boger, is considered extremely critical, requiring another surgery to stabilize him overnight.

"To know that my son made it, and to know that so far every parent can be blessed to know that their child is still here, to me, that's a Godsend," said Amanda Leonard, Hurt's mother.

Authorities are still working on a theory as to what happened. They seized computers and other information from the Hribal's home looking for answers.

Hribal's attorney told WPXI, the Pittsburgh NBC affiliate, bullying was not a motivator, but there's no clear explanation at this point.

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